GIK alternatives

If you need treatment above 100 hz, try Acoustimac in Tampa.  The lower 2 or so octaves are more difficult to manage and the quality of Acoustic Sciences in Oregon is excellent. Ask for Jordan. 

Good experience with Audimute.

I used ATS just over a year ago with great results. 

I'm going to pile on GIK a bit here, too.  I simply cannot recommend them.  I can understand the manufacturing delay due to availability of materials.  All I ask is that you be up front and transparent.  They were not.  I corresponded back and forth with one of their designers for weeks getting product recommendations.  At no point did he even allude to the ridiculous lead times.  It wasn't until several weeks after I placed my order and paid them that they revised their delivery time from 1 month to 3 months.  Every time I reached out to them for an update I got a different excuse.

That wouldn't have upset me as much had the product been of decent quality when I finally got it.  It was not.  The items were not packed properly and the diffuser plate on every one of the 4 bass traps had damage, from deep gouges to corners broken off, all from sliding around in the box during shipping.  That's what happens when you leave 3" of empty space at the top of the box instead of filling it with packing material...  GIK was apologetic and sent replacement panels, which of course took another 2+ months to arrive.  Almost 5 months all said and done to get a finished product.

Bottom line, I'd avoid them unless nobody else makes what you're looking for.  It's unfortunate because I was going to buy additional panels from GIK, but not now based on my first experience.  Seems like I should check out ATS and see what they offer.

I had the very same experience as the above post.