I have two of these, each in a 1,000 gallon system. BEST filters I've ever had.
The big advantage is the backwash.
You never have to get your hands wet or manually wash media.
I have had mine about 7 years now with no problems.
A little bit of plumbing for years of easy maintenance.
Def worth it!!!!!
I have a massive bioload with 10 fish at 12 inches each in each tank plus many smaller fishes.
I went with advantage plus (from "Sacramento Koi", very good people to deal with)because it has a see thru lid and you can see how clean the beads get after a water change.