Works great so far. The iOS app was janky at first (it would forget about the hub it was connected to) but seems better now. I don't really use the app though - a recent update added Alexa support, and that works great. I've mounted the remote control on the wall and either use that or Alexa to turn the lights on and off.

I don't want purple or green lights in my living room, so the fact that IKEA bulbs are limited to warmth and brightness is fine for me (I like to just keep them on "warm").