At this point, it's pretty difficult to imagine anyone questioning whether it's "safe" to trust Canary or not -- but it still feels that a quick note/fyi is appropriate:
Ordered 3 Prisma (Prismas? Prismi? Prismaux? Prismoxen?) and received 2 in the first batch; the third showed up yesterday. My experience with Canary was excellent -- considering I've never participated in a group buy before (only direct purchases from manufacturers, eg, Bitmain and the like), the process was smooth sailing the entire way.
Everything arrived on-time -- in fact, I had mine in hand before certain other GBs announced they'd received their first "batch."
(No disrespect to any other GB intended -- just pointing out that Canary's "All mail comes here first, before anywhere else" claim seems to be pretty damned accurate. My current suspicion is that he's secretly like the Brother-in-Law of the Postmaster General or something. In fact, if you look closely at his user pic, it's *clearly* a photoshop job -- I don't think he's even a bird at all.) People were still debating in the main Prisma thread "whether or not any Prismas are in the wild yet" at least 2 days after I'd already received mine and placed 'em into service.
And all three sound like enormous "industrial hairdryers" (if such a thing existed) -- so yes, I can confirm they arrived undamaged, with absurdly loud fans functioning per the manufacturer's specs.
What's that? NO, I SAID THAT THEY ARE FUNCTIONING PER MANUFAC-- oh nevermind. 
It has been a pleasure doing business with you, Canary; I still might grab a couple more of these from you later on...if and when I'm able to adjust the exhaust setup in my spare room enough to lower the ambient temp a few degrees...anything cooler than the surface of the sun will do for now.

But back to my main point -- I highly recommend Mr Yellow Bird of Happiness to anyone out there (especially any GB-newbies like myself...unless I was the only one left, which could easily be the case): If you're in the market for an Avian-Managed Prismaux Group Buy, this one's your best bet.
[ Noted one more time for clarity: No disrespect to the other Prisma Group Buy, which AFAICT appears to be handled in an equally professional manner. ]Is there anyway to replace the fans with a quieter one? Do you happen to know the CFM of the fan used?