My wife and I were on the Med in mid-October, and we had a great time. You can check out my comments under other recent threads, but everything was great. The food was good, the staff was wonderful. Yeah, there were a couple dishes out of the whole cruise that weren't to my liking, but that's not really surprising or even bad. Sorry, I can't tell you about the activities for kids, though.
If you want to have a good time, you will. I'm looking forward to going back as soon as I can!