Devialet Expert Long Term Experience?

Would love to hear some more long term experience on the Devialet 200 or other of the Expert series amps. Many flattering reviews but few real life stories.

I recently heard two of the 200s as 400W monoblocks with the B&W 800 D3s and was blown away. I will listen to a single Expert 200 soon with some more speakers and am pretty sure I'll like it. I am a bass head and loved the tightness, accuracy and speed but at also loved the resolution and width of the mids and highs.

What I would like to know is how the Devialets feel and behave long-term in daily usage. They seem to run quite hot and some seem to experience some loss in SQ while running hot. Does it, despite the whole running class A/D in parallel thing, deliver class A quality with class D quantity and does it do so reliably at high temps over many hours and years of use? Any other bugs in this rather unconventional approach to an amp?

I just bought The 400 a couple weeks ago. I haven't noticed a degradation of sound after a few hours. The only complaint I really have is that their instructions on the website could be clearer. I haven't been able to get the wireless streaming going yet. I am a bit of a non tech person though. The prices on Audiogon for Devialet have really come down. I bought for that reason.
For the past 6 months, I've been using a Devialet 200 to power a pair of Wilson Audio Sasha 2 Speakers in a large room and have been very happy with the operation and performance of the D200.

The Devialet has an ultra black sonic background / ultra low noise floor, with powerful super tight and deep mid and low bass -- possibly the best that I have heard.

It is super fast, with plenty of detail and great imaging, plus a wide and tall sounstage.

Everyone that listens to my system simply can't believe the powerful and undistorted sound that is generated by this 15" x 15" / 12.5 lb. Component -- I've never seen people so perplexed.
Thanks for the answers guys! I'm trying to decide between a Devialet 200 and a Parasound Halo Integrated. I couldn't audition the Halo yet as it is hard to get in Germany but my feeling is that the Devialet packs more punch than "regular" amps, even with comparable outputs. 

Does it subjectively feel like a reliable component for the long run? Like you just turn it on and have it running all day?

I've yet to hear anything better than Devialet - the D200 is spectacular, the D400 better and the D800/1000 genuinely world class.  For real world budgets the D200 is light years ahead of anything else.  The sound has resolution and detail equal to the very best (Solution and Boulder) with perhaps even better bass.  The musicality and PRAT are again reference class.  All in all, the sonics are without reproach. Then you factor in the cost saving without an ugly mountain of separates and all the power cables and interconnects you no longer need.  Then there's the configurability and ease of use.  Full and complete sub-woofer integration better than a standalone JL Audio CR1 as well as SAM speaker matching with bass time alignment. You can pretty much control it all from ROON over wifi.  The new 220 Pro is even better.
The Parasound isn't even in the same league.
I leave mine on 24/7, sat on a granite slab on Cerabase feet.  Devialet air will run on Windows or OSX and does need a strong wifi - or Ethernet.  USB is pretty damn close but I hear wifi ( no galvanic connection/jitter) as the best of all three.  Powering my Focal Utopia 3 Diablo's with JL Fathom subwoofer, it's damn close to perfect.
One Wireworld Silver Aurora 7 power cable and a pair of Analysis Plus Solo Crystal 8 speaker cables - simple and done.
Thanks guys for your opinions. Only confirms what I found while auditioning and what I keep reading in reviews. Guess I'm sold..
My previous setup is Parasound JC 1 monos with JC-2 pre and an Exogal Comet plus Dac. i can't say my Devialet 400 blows it away. I can say they are pretty equal. I guess long term I will have a better answer. I can say that I am happy to make the swap considering all factors.
Bubba12 you might want to head down the cable rabbit-hole.  Power and speaker cables make a huge difference with the Devialet. If you're not hearing a big improvement from the JC1's it could be your system is being held back some where? One thing is for sure, the Devialet will reveal any and all changes!
Or perhaps the JC1's are just as good an audio product, which I suspect they are.
I definitely will pursue some different cables soon. Any suggestions? @leeagc 

@jetter  That is what I was getting at. The Parasound gear was fantastic. I have a space issue because my setup is in the living room. I am very pleased with the Devialet 400 though.
I started my system with Verbatim 3" copper ribbon cables - all around great cable but no longer made. I then tried Nordost as they seem to get so many rave reviews, especially in the press.  First off were Heimdal, total garbage, super thin and badly tipped to brittle highs, grainy.  Next was Analysis Plus Oval 9 - total opposite and full of body with more and better bass than I'd had with the Verbatims.  Then a pair of Nordost Frey 2, better than the Hiemdal but still horribly unbalanced and thin.  After that I went back to AP and found some Solo Crystal 8's.  Meanwhile, my buddy had lent me Transparent Super, Tara Labs RFC something and a few others, non came close to the AP 8's.  The one thing that stood out was the huge differences the speaker cables were making.  I'm convinced there's a lot more to come and looking forward to trying some Crystal Cable and Siltech, though for value I'm strongly considering the Cerious Tech Graphene Extreme and the new Lessloss C-Mark.  Whichever works will dictate my power cable.  urrently I'm using Wireworld Silver Electra 7 and have compared it to $1200 Shunyata Z-tron Sigma HC which it handily beat.  The PS Audio 12 was worse again!  Both sounded like a thick veil in comparison.  So did the Niagra 1000 and Isotek power conditioners.  I've gone back to straight into the wall, though I am planning to update to a dedicated 20 amp line with Furutech GTX outlets.
I'd suggest buying used, taking time to try some of those mentioned and see what appeals.
I installed the D400's a few months ago along with Verity Parsifal Ovation speakers. I have also added a Naim Unitiserve ripper/streamer as part of a shift away from cd's toward streaming. The Devi combined with streaming has allowed me to replace 6 major Naim components (amp/cdp/pre) all with separate power supplies, and eliminate an outboard DAC.
Streaming cd's from a hard disc to the digital input on the D400 (via Unitiserve or others?) significantly out-performs the Naim CD555, 552 pre-amp and 300 power amp. That's saying something because the Naim gear is simply outstanding at cd replay and much more. And the D400 (new) are about half the price of the Naim cd555 alone!  While not inexpensive, the vfm is off the chart, particularly in the re-sale market.
I feel like I've crossed a time-line between the past and the future of music reproduction. 
I've never heard the D440's but those who have, say they are quantum better. 
The only downsides I could mention:
  • requires patience and learning to set them up perfectly using the Congifurator
  • with upgrades coming fast and furious from Devialet, depreciaiton on the re-sale market is initially quite high (no worries if you keep them)