Ran the SM201 for a couple years. Great skimmer, no issues, construction quality was excellent. My only knock is the manufacturer ratings are super exaggerated... Go with BRS' ratings, they are much more true.
I know firsthand as I switched to a Reef Octopus 5000 skimmer rated roughly the same on the high end as the Skimz and it pulls out wayyyyy more skimmate. No knock on the Skimz unit I had, it was a beast, but now I can see personally that the rating the manufacturer put on it was bogus and BRS was on the dot with their ratings.