I'm a bit late, but yes, OBS is an excellent recording program.
It has full HD support, allows you to change the quality and what not depending on what you need (whether you need to limit the capture quality to improve gameplay smoothness, etc), and it's a lightweight program, takes only a short time to download and install.
I personally use it whenever I play on a TTT server I'm an admin on, just for security in some odd situations. 200-300 gigs of video I've recorded so far, and I've never had a problem with it.