We travelled with Thomas Cook premium service last August, Manchester to Sanford. We found them to be fine, agree in terms of food, crew were fantastic, really good with the kids. Flight both ways left on time. Only gripe we had was the entertainment system didn't have the pause, fast forward option, can't remember the correct name for it. Also, although they advertise free lounge at Manchester airport, it is misleading as only 1 of the long haul flights gets in there; as such we weren't allowed entry and were given vouchers instead to spend in the airport. Whilst this was okay, we would have preferred to know this up front as we would have purchased tickets to lounge beforehand.
Other than these 2 points, were perfectly happy with Thomas Cook.