As stated-you will probably get mixed answers. I have 2. Got them the same day from 2 different sources. Until yesterday I ran one at 1.04 official release and the the last beta. No problems with either one really. That said, this is new tech that is still in development. Some features arent even available yet, like performance mode. I use one unit as my test/backup and the other as my main band rig. I try out patches and firmware on one, and once I trust the firmware or like a patch enough - it moves to the band unit. I work in the computer world, so dev/test/qa on one box and production on the other. Once in a while I get something wierd. I had no input one night. It was there, then it was gone. I blamed it on my wireless and moved on. I didnt have those issues the next practice so it may have been my lack of understanding of the volume control setup. Which, now that I have been messing with it, I really like. Just last night, I turned one of the units off, and stompX stayed red-with the rest of the unit dark. That was wierd. Nothing has negatively affected playability for me. Quiet the opposite, both bands prefer to tones I am getting to my axe2 setup. Of course, they both think it looks cooler as well, but tonally speaking it is blowing my mind. I had moments like that with the axe2 as well. A really great sounding night, and then I struggle the next week to reach the same tonal nirvana. Hasn't happened yet with the KPA. My only regret-I didnt wait for a black one so I can tell the two apart a little easier.