My experience with Easy Jet was more along the lines of any discount airline. I saw the ads all over London about the cheap rates to Edinburgh. I found these excellent rates were only available if you were willing to fly at awkward times (well awkward for me anyway!). I wanted to fly up to Scotland on Friday evening and back to London on Sunday evening. Obviously prime travel times for business travellers. I actually got a better rate from British Midland for the times I required, with reserved seats, a meal (of sorts) and a couple gin and tonics.
I am, admittedly, not a fan of discount airlines. I have blasted Canada 3000 in the past. If your flying times are very flexible they can save you money but if you book far enough in adance and it isn't peak travel season you can get good rates on non-discount airlines as well.