I bought the game with headset when it came out. The game is cool, the only thing that was disappointing was that I had to insert the game every time I wanted to play.
I assumed since it was available to download on PSN that I was able to do the same with the disk, just download it to my hard drive, but no dice. This has stopped me from playing often, because I'd rather just be able to turn on my PS3 and just play Warhawk without inserting the disk all the time. I might even sell my copy and just buy the PSN version to do just that.
Now if Sony lets me buy their stuff with my credit card maybe I would but it declines it every time which is annoying, probably have to wait until some PSN 'money' cards start rolling in stores.