The pump residing in the tank was what turned me off. Sure it doesn't need priming but I only have to prime my canisters when I first set them up or after a cleaning. For the other 3-4 months priming is a non-issue. Having a pump in tank is annoying and not worth the convenience of no priming. Plus the whole point of a canister is media choices, this one seems to force you to use just their media.
I don't think I have ever bought a filter that said "use anybodies media that you want"! With the clever people on this site I bet someone will find a way to improve upon the media options.
