The app is pretty difficult to use, but it was tolerable, and I mostly used voice commands to operate the lights. But the app seems to lack basic functionality, like slowly changing light levels over minutes instead of a very quick fade. But after 9 months now, one bulb just stopped working in its group. (I have a lamp with two bulbs, both part of the same "group" in the app.) OK, so I deleted and recreated the group.and now both bulbs are turning off randomly, or sometimes won't work with the gSee full review