On the nano cube forum it seems to be the majority of the folks are more than happy with the skimmer, some had cracked elbows, as mentioned above but Current has replaced any cracked elbows with just a phone call, some have had problems getting them to fit inside the sump area on their NAno and Aqua pods, which is hard to understand why, so I have to think that problem is user induced, since others managed to put them in place without any problems.....My LFS received about a dozen of them and in less than a week they were all gone....