I like the concept quite a bit. Average consumers (read: chumps like me) are already familiar with search engine analytics stuff like Bing's flight price trackers, but that's merely an informational chart type service.

I like that this service presumably looks at similar data, but finds a way to help aforementioned average consumer directly benefit from the data!

EDIT: Oh whoa. I didn't see bluedevil2k's post (https://news.ycombinator.com/item?id=7623622) about Bing pulling the flight data stuff. Interesting and somewhat troubling! I also hope that LevelSkies has some hedging in place, but I think it also makes their service seem even more important.