We did this excursion in 2010. I enjoyed it. While we didn't have a lot of time in Eze, we had a really nice lunch there. We were seated with the onboard lecturer and his wife.
The weather that day was very nice. But there is a lot of walking, especially in Monaco (uphill). We went in the cathedral there and saw Princess Grace and Prince Rainer's tombs.
In Monte Carlo we went to the "downtown" area for a snack (ice cream & drink) then had free time. Some people went to the casino (I think there's something like a $5.00 charge just to go in. We just walked around and took pictures. We also visited an open market near the beach for about an hour.
Not really part of the tour, we saw the Onassis yacht on the way back to the ship. Our guide had the driver pull over and stop so we could take pictures of it.
We did also. It all depends on the tour guide. We had a tour guide when we were on a RCL cruise and we went to Capri. She was brutal and rude....and she was an American transplant. Worst we ever had....

