I agree. I watched the making of video after finishing the game and it's impressive how they put this game together with a small budget and crew. I was thoroughly impressed.
Yeah, 300K sales to break even. At $30 a pop, that works out to a 9 million dollar budget. Since Sony and MS take a percentage from each download, it is probably more like 10 million. But that's a small budget in today's terms. I remember the lead developer (Antonaides) saying AA games had disappeared, he wanted to find a way to bring them back, but with AAA production values. They had to keep it fairly linear and short, to do that.
I'm glad it's been successful. Hopefully it will inspire other developers to try the same approach.