Connects easily via Bluetooth, and starts up and powers down quickly. All the button features are very easy to use, and I even used the JBL app to connect it and change the lights and such and I haven't had any issues with the app so far. The light features are very cool, and even on the lowest brightness setting (can be adjusted via the app), it is VERY bright. For such a small, rechargeable speaker, the bass is VERY strong and the best of any speaker I own. The battery life is quite long -- I've used it a few times now at length and I haven't even needed to charge it once yet.
My only issue with it is there's no way to go back a song. There's a way to go to the next song or fast forward, but no way to rewind or go back to a song by pressing a button on the speaker. That's a really minor issue though, and doesn't bother me much.