No complaints so far–my requirements and expectations for it were pretty minimal to begin with. Face recognition is decent although I have to regularly go in and correct a lot of unknown faces from time to time.
Only thing that bugs me currently is having to log in every time. I’d really like a remember-me option.
It does some object detection, but I’m not very impressed. I haven’t had a real need to search for pictures by object yet, so I’m not sure if it would suffice in a situation where it really mattered.