Having owned the EK-XTOP Revo prior to this one, I chose the BP Premium top because it is pretty much the only one that fits in the back of my case (Parvum Systems S2.5). And this indeed deserves the title "premium". Criterias that made me choose this product: Low profile, modifiable metal mount                                                                 Pump pushes inside the top, which reduces the length. That was a very critical point                                                                 And of course the good looks Included are two metal mounting brackets, suiting hex screws, a stop fitting with o-ring and two allen keys with a ballhead, which is much appreciated (forgive me if I forgot something) Installation is quite easy if you get that you have to push the big o-ring inside the acrylic top and not over the pump. Also worth noting is that the acrylic is surprisingly resistant to scratches, nowhere comparable to the normal case window material. I honestly don't have anything to criticise. Does what it's supposed to