I've actually had it for several months. I didn't get to play around with it too much, but for now its main use is with Google Music. I ask it to play songs, bands, albums or just generic stuff like "saturday morning music" and it's pretty good at it. I also ask it the weather, I occasionally set reminders on it and once or twice I set a countdown. I guess I'm not yet accustomed to it being there.
Best part for me: coming home at night, I can just shout at my Google Home to turn on the lights instead of stumbling around in the dark looking for the light switch!
The information, about who and when I listen to Spotify, was clever and intriguing, the Spotify.me playlist they suggested was awful.
Also it noted I listed to 28% Soundtracks, 22% Scorecore and 18% Video Game music and said that I love upbeat music and like to dance to it. I don't, most my pop music is by artists that have upbeat songs, but I prefer their slow songs, so not sure where it's getting the information from. In fact, only 16% is Post-Teen Pop so really not sure about that.
Spotify.me is about not spending hours making playlists. Instead its listening to what you like and the algorithm developing one for you. It brings in music that you would not find on your own into your playlist to make your own sound.