I agree with most of the above, though I have one + and one -
+ You can get a boarding card some 30 days before you fly, if you have no hold luggage. Coupled with speedy boarding this makes for a stress free route through the airport.
- Sometimes boarding is started as the incomming aircraft arrives. You may spend 20 minutes or more at the front of a queue in a draughty stairwell or "cattle pen" before getting on board.
Overall - not bad for the money. I flew to AMS at a weeks notice a couple of weeks ago - KLM wanted £350 for MAN-AMS, Easy was £78 LPL-MAN for the same times (+/- 1 hour) including the speedy boarding.
Make sure you don't include the insurance when making your booking - it takes a couple of clicks to get rid of it (unless you need it!)