I have two Fluval 404 canister filters. Each is on a different tank and I have had them now for over two years. I know others have had some Fluval horror stories, but I have not. I use bulk media when it comes time for a change...much cheaper than changing with the actual Fluval brand! I got both of mine for about $85 a piece. I went to Big Al's online (who has very good prices) and printed out info on their Fluval price. I then took that to Petsmart, who price matches, and got them for the $85 dollar price. Plus I didn't have any extra expenses with shipping etc, since I got them from a store.
I haven't had any issues with my Fluvals and they have cut my maintenance down significantly. The water stays clean and clear.