It's a neat little filter. Has some oddities though that I think are only associated with the classic 250 and 350. The worst one for me is the silly output / discharge hook. It's designed to hook over the side of your tank, not the back. I had to cobble together a 90deg elbow from another filter to get the discharge to shoot to the side. If you want the spray bar on it, you have to have a section of hose between the hook and the spray bar to make the necessary bends. The hooks for both the suction and discharge are barely big enough for the rim on the Aqueon 55g it's on as well.