Hello ! I have a Aqua Medic Armatus XD 300 - the Quality is very good the tank is nice glued without Anything bad about it - the easy drain System is nice its very quiet but it takes a bit in the beginning to adjust- i would change the top up to a Burger container and get an ATO - sump system is nice easy to adjuste Water level- all in all im very happy with the tank and it’s very quiet- the only downside for me is that if you Turn the return pump off the back chamber gets emptied into the sump and it Takes some minutes After turning on again that the back chamber Gets filled and everything is quiet again - the extra Depth from the XD line is very nice !