Hi, I was on two singles group cruises. One was with TSW over New Years on the Costa. I had no problems or issues with TSW and would use them again. Costa had a few problems with a new ship, crew issues, and food quality, but that was not TSW's fault. TSW tends to have smaller groups, 25-30 people. The other group I went with had 350 singles and there was more group interaction and involvement. I enjoyed both groups. I had roommates assigned and didn't have any problems.