I've been a user of Bandicam for maybe a month or two, and I want to give some feedback.
First of all, Bandicam is really good, and laggs less on any game, and in my opinion, it's better than Fraps.
The free version has a 10-minute limit, while on Fraps, It's 30 seconds.
Second, Bandicam has less file sizes than any other game recorder (especially Fraps).
Third, you can record windowed programs. Which is even better!
Now, I've had a few minor problems with Bandicam. Like, hooking it to Minecraft and recording, crashes Minecraft. But of course, recording the window of Minecraft solves that problem.
So, in my opinion. Bandicam gets 9.5 out of 10.
Hope this feedback means anything to the Bandicam team.
-Alex/LazehPanda