We much prefer independent travel, but in 2010 we did an 11 day coach tour with my sister even though we swore we'd never do one. Wasn't perfect but overall we did enjoy it. My sister came to spend a month with us, and the coach picked us up just a ferry ride away from where we live, took us on the ferry from Newcastle to Amsterdam with stops along the way to our final destination of Rome. The coach was only half full which was nice in a way, but that meant the company was suffering so they changed some of the hotel bookings to cheaper ones. The hotel in Rome was very close to the Vatican but had not been redecorated since Caesar's time! The food was awful! But the main reason we wanted to go was to tour the Vatican and we loved it! And Pompeii, and Florence, and stopping at a few places in Switzerland on the way back.
I mentioned to my husband this morning that maybe when we are about 90 we could do coach trips instead of independent and he said 'no way'. I guess when we are too old to rent cars any more we'll do trips involving trains.
My sister is coming again in 2016 and we are thinking about a river cruise up the Rhine. Need to research that as the big company, Viking, is very expensive.
The tours that used to be called Elderhostel and are now Road Scholar(?) looks awesome! I'd love to do some of those as they are done by what you are interested in, where you want to go, activity level, etc. Anybody done one?