I've taken advantage of Easy Jets bargain prices and can confirm the prices are for real, but don't forget about the airport taxes which aren't included in your ticket prices.
I can also confirm that Gargoyle has it right too, they are like buses and you can't book actual seats on them. It's a bit of a scramble to board as everyone tries to make sure they get to sit with their travel companion.
At the end of the day, it's a no-frills service at a hell of a discount and I've never understood the desire to force down a meal that you wouldn't give to your dog, when you're on a two hour flight. And so what if you're sitting next to a stranger? We're all strangers.......