Great choice. I have a 302 Scrubber and it works extremely well. I like the new designs.... less light pollution into the fish room. My nitrates and phosphates get gobbled up even though I feed like crazy. My scrubber is oversized.... too much...but he had a deal on it and I bit... I still run a skimmer.... but Joey insists that you don't need to. Also... he says you don't need to do water changes... I still do monthly... to help replenish elements not otherwise dosed.
The only two complaints I have are: a) the light pollution which in my basement is no big deal except the neighbors are convinced I am growing something I am not, and b) cleaning the screen on my scrubber is a major pia. They are too wide for my sink... and tables... so I need to get inventive and it is a pia.
All this said... I don't run GFO, Carbon... nothing other than the skimmer. I feed like crazy and the fish and coral are very happy. The scrubber also has tons of pods and micro fauna that also grows in it. It sends a regular supply of live food to the tank...which is great. I have a mandarin that is particularly appreciative.