got my 900 for christmas today, replaced a One with it, which i then passed down to my mom to replace her 510, which will now go to my stepdad
looooving the 900.
the screen transitions are a bit sluggish, mostly when switching to activities from my soft buttons for an activity. the switch between screens for soft buttons isn't a huge deal to me, not like i thought it would be based on previous posts. hopefully logitech can speed it up a bit though.
after using the One for a year and now having the colored buttons on the remote itself i use far fewer soft buttons anyways. didn't add near as many for my activities as i did for my One because i never used any of them for the most part.
my remote is now much more streamlined, and nooooo more missed commands! i only use the main ir blaster and it controls everything including the tv and my ac window unit behind the tv! even with components placed in odd spots due to not having a proper entertainment stand it still works with everything.
i'm very impressed. only bad thing was having to create a new account, i still don't see why this is necessary. yes the remotes use a different os, but i would think logitech would be able to get around that, i mean just re-add all my devices and activities automagically. i dunno i just think they got a bit lazy there for no good reason.
overall i'm thrilled and am now prepared to offer up help to anyone who needs it