Anyone used these audio ceramic slow blow fuses from Littlefuse?

I need no persuasion as to the lack of any sound reasoning or science behind "audio" fuses. I'm simply asking if any believers in the congregation of audio fuse purchasers have formed an opinion about Littlefuse's offerings?  No need to re-argue the same objectivist-subjectivist points in every single thread. 

Yes, Littlefuse has always made ceramic fuses but up to this point their offerings have cost a dollar or so at the most. The economy of scale that they potentially have in manufacturing does make one curious as to how these compare to standard issue fuses and the $50-$200 varieties. Fuses are simple things. Other than the wire elements, the material that caps are made from, and any possible filler, there's not much that can differ between brands. If no one chimes in with actual user experience, I'll have to spring for some myself to test in my PSA BHK preamp and amp.

Well, thanks for all the witty replies (even if we're none the more enlightened.) I'll order a few and report back. It doesn't appear that these fuses are getting any great push into the marketplace from Littlefuse. Product pages on Littlefuse's website let you see what retailers have had inventory shipped to them and only two retailers are carrying these at present. 

Thanks for your input BigShutterbug. Where did you purchase your fuses?

Thanks for the follow up Bigshutterbug, sorry I didn't respond earlier. I wouldn't exactly say I'm a nonbeliever in tweaks of this nature, it's more an issue of whether the effects achieved by most tweaks are really worth the money one spends. By the time one spends money for a few of the most highly touted fuses, footers, cables, etc. for a system of separates you could  find you've spent a significant proportion of the cost needed to upgrade to the next level of component quality. I certainly have spent the money on upgraded cables,footers, etc., but have also been wary of spending disproportionate to the level of improvements achieved.  I've only experimented with a few Hi-Fi Tuning fuses to this point and haven't been all that impressed with what I've heard.