We did the Amalfi Coast/Pompeii from Naples. A good tour but very long and exhausting. Lots of driving and fast paced but Pompeii was great to see. We had Luigi who was an archeologist and really knowledgeable.
Naples itself was dirty and there didn't seem to be any reason I would go back there.
Rome/Vatican tour - this was an expensive tour and I'm glad I saw it even though I consider it "Drive by Vatican" tour. It was extremely crowded as the Pope speaks on Wednesday am and there were thousands of people crammed into the spaces. We barely had time to stop during the tour to take pictures and we walked elbow to elbow through the entire tour with many, many other groups. The Sistine Chapel was something I'm glad I saw but I would never do this tour again. An hour and 45 minutes just to get to Rome from port and then 5 hours running through everything. Do not do this tour if you aren't comfortable in a really crowded situation and aren't able to walk for 5 hours without a break. Skip it and go to on a Thursday in January when you can actually enjoy it
Florence on your own - so glad we did this one on our own. It was still lots of driving in the bus but we were lucky with an amazing tour guide before we got there who gave us tons of info. Still a very long day of walking and we didn't wait in the lines to see the great works of art. Was sorry to miss those but there just wasn't time.
Marseille - I changed this since we didn't get into port until 1pm and the tour would have ended at 6 (we had Cirque reservations at 6:30). We did the easy Marseille tour which was okay. Some time on our own but the tour guide was reading the notes rather than being knowledgeable
Majorca - this time I didn't book anything and we simply paid the $12/each for the shuttle from the ship into town. Nice day and okay to walk around but there were many shops closed (due to lack of business?) and the others were shops like Guess that I really don't need to see in Spain. I probably could have missed this stop and stayed on the ship at the pool.