Great product... no bs.  Read this review.
I don't usually write reviews, but I had to share my opinion.  This is a great product.  I have a 55g hexagon marine aquarium sitting on a custom metal stand.  Hexagon tank owners will agree that the space under our tanks are very limited, and every inch of space is critical in the sump area.  I'm running a smaller sump, Eshopps RS 75, and after long consideration, I purchased the Reef Octopus 110 Space saver, and I'm very satisfied with the results.  The foot print is great, it is very silent, easy to adjust, easy to assemble, easy to clean, and pulls out a hefty amount of green sludge.  It only took a couple days to break in the skimmer to where it was pulling out a thick green sludge, which I empty out frequently with ease.  My tank parameters are steady, and it has a lot to do with the effectiveness of this skimmer.  It works really well for my setup.
Rating: 5 stars