I am enjoying it.
I downloaded Yousician and have been doing some fingerpicking single string single fret to a backing track, I am liking that, though my co-ordination (normally a strong point) is proving to take time to settle, and frustratingly, often it doesn't pick up sounds and says I still have played them even though they were played clearly... Also, timing seems hit and miss. I can't work out what's going on...
I might try another similar app and see if the same thing happens.