BaltimoreFish,
I use the Finnex, hang on LED refugium kit. I have set it up with the two partitions instead of three. I have live rock rubble and chaeto in the first partition, then I've got the more delicate red and calypto species in the second partition. Had some issues with cyano gunk/sludge build up on top in it's earlier days, but it's around 2 years old now, and the different macro's I have grow really well in there.
I think it's been essential in my zoa growth. My main zoa colony has been known to "spit" 7+ heads in 1-2 weeks. And I think the H.O. refugium is actually advantageous over the typical sump refugium, as the micro fauna does not have to enter an impeller housing to reach the "DT".
Hope this helps.