Actually It's not bad for a free software, I give it 4 stars, it works and works fine on my Mac. the FPS is high, no obvious lag, the resolution is native (same as your screen's) and yeah, I got it for limited time free.
The drawback is, you cannot change the path of the saved files, you either drag it to dropbox or let it sync with cloud app or droplr if you want to put the recording footages on the cloud. and you know, the footage will easily over 100mb but cloud or droplr only offers 23mb per file/
And it cannot activate iSight camera which makes it less useful.