It's poorly documented (so you'll need to dig into the source to figure out how to use it) and at least when I was using it did not play well when scripted (like sending commands to the container). It also wasn't terribly reliable (a command might work one but not the next time) and it seemed like it was in a state of transition. (moving towards a RESTful API?) I just think if you use it now you'll end up writing stuff (at least) twice.

Not that raw LXC is much better... It all seems very immature.