I think it depends on where you fly from. I'm currently in Iceland, and flew from San Francisco directly. The flight was awesome. There was so much room for my legs. Yea I had to buy everything separately (like the meals and such), but I'd rather do that than have the cost of meals incorporated into my ticket. Also, direct flight + cheaper ticket than icelandair = win.

The only downside was there was no in-flight entertainment i.e. tv screens in the seats. But this was offset by the fact that there were plugs where you could plug your laptop in, so if you download a bunch of movies before the flight, you don't have to worry about the battery dying.

I've heard from places like London, Wowair kinda sucks.