I've flown EasyJet before and the only concern I have is that they don't seem too keen on keeping their passengers informed regarding delays.
Had a flight from Belfast to London-Gatwick that was delayed and 20 minutes after the flight was supposed to leave, no announcement, no information on the screens, nothing. Got a little nervous so I had to track down an EasyJet employee (who are scarce outside of check-in) to get the skinny.
Other than that, no problem.