The latest batch of them seems pretty good. I had heard about the early Aquapods cracking, but that doesn't seem to be a problem any more. The only real "issue" people have is with the heat, but there are ways to manage that. I think all the out-of-the-box, all-in-one nano systems have their issues, and heat is the issue with the Aquapods. Though, if you go open top halide, then heat might not be a problem.
That being said, I'm very happy with mine. I've done a couple of minor things to improve the setup, but it's a nice system right out of the box.