Flew MyTravel last year from Gatwick. Aircraft was an Airbus 330....new plane, plenty of room, seat back TVs with external cameras, downstairs loo, flights bang on time (arrived early) good choice of movies, friendly cabin crew and food was Ok. Drawbacks were no kids meals or kids packs, you had to pay for drinks and the check in on the return flight from Sandford was AWFUL. The London, GLasgow, Cardiff and Manchester flights were all leaving within 2 hours of each other and there were only 4 desks open. It took nearly 2 hours and then we had to be rushed to the front as the plane was boarding and we hadnt even checked in.
I would give the flight itself 9/10, Mytravel "services" 5/10 and 8/10 for Gatwick check in and minus 500 for Sandford check in!
Would use them again but would upgrade to Premiair (free drinks, kids meals and packs and seperate check in desk).