Flew them once to Paris. The flight was cramped, but it was only a 40 minute flight. Make sure you allow PLENTY of time to get to Stansted if you are coming from London. If you miss your flight, they will not rebook you on the next flight without paying a 40 GBP fee. The Stansted Express is notorious for breaking down (as it did for me, although not when I was flying buzz).

Chris