What i like about EMS is the weir's are allot longer than anyone else's which benefits in the skimming of water surface. Also i like the fact that the outside box is same height and the theory of it when it comes to water level's. All around great looking products.
I checked out their page. There are many features that I like. I like the size of the over flow boxes and the ability to make your sump compartments the size you want.
I like that they created a sump for almost any size tank and the placement of weird allow the skimmers to get a lot more gunk. I also love the idea of how they utilize space and there is also evidence that they listen and value their customers even in their product descriptions!
Setting up my first saltwater and picked this up as my sump! Still have to silicone the baffles in (hopefully I wont have to after tomorrow) good luck to everyone!