I had this sump working on my cichlid tank for over a year working fine with 50+ fish in it. and it was packed full with more than enough media.
Afters using a sump I don't think I would ever go back to canisters, I find sumps easier to do maintenance on with out having to pull everything apart. If it work then it works, If it doesn't then I will change it so it does. I will just have to find out the hard way