I've been on 3 Leger Singles Coach Holidays [Silver Service] on my own. There are two aspects, firstly, how the holiday is run and secondly, who's on the coach, obviously the latter is down to luck.
On the the type of holiday I chose it was door to door so I didn't have to carry my luggage at all.
I went to Rovinj, Croatia with a wonderful crowd, the day trips were great, Roman ruins,cheap markets, the only disadvantage was an overnight both ways on the coach. The resort hotel had good facilities and buffet menus.
Next, the Italian Dolomites, overnights en route in an excellent hotel, then beautiful scenery en route. The resort hotel was family run with a limited but adequate menu. Great daytrips again, including Venice and Lake Garda. A more cliquey crowd, but I palled up with two very likeable people.
This year I did Spectacular Spain,[overnights great hotel] day trips to beautiful places but not a good crowd, worse a couple of really gruesome men came onto me, and coach holidays do force you into spending a lot of time with the same people. The resort hotel buffet was somewhat variable as was the attitude of some of the staff.
The drivers are generally helpful and mostly very affable. The holidays are tiring because of the time spent travelling there and back and on day trips.
On the whole, I would recommend them, I hope my experiences clarify your thoughts.