We have done a back-to-back-to- back cruise. We did a ten-day Canary Island cruise from Southampton, then 7 days to Scandinavia, and finally the Transatlantic to NYC. We travel from the states, so we like to stay in Europe as long as possible. We were very fortunate, we had Cruise Critic friends who were on the cruise before us and arranged a very nice table for six in MDR. Another perk, all the staff gets to know you better. Doing a few cruises before a TA can be stressful, but you have the TA to rest and recuperate. You will get into a routine that is very relaxing.