I really like the idea behind it. Getting an Amiga today requires either an expensive (and technically challenging) piece of vintage hardware, or getting an emulator (which can be equally daunting depending on which one you choose)- so having a simple, plug-and-play device is a great way to get people who are interested in Amiga into the Amiga scene without bankrupting/frustrating them. I know a lot of the collectors and hardcore users have maligned the thing from the onset as it is much more limited than a "real" Amiga would be, but I think it will benefit the community as a whole having more people interested in Amiga. My 2 cents, anyway.
If it's anything like the C64 devices, I expect it'll be "widely" available sometime later- and I'm thinking I might hold off for a while in case they really do make a "full size" version like they did with the C64. I would be much more interested in a bigger "real deal" variant than the little mini console version.