I have a XP-2000 cone... I replaced a MSX-200 with this one and I absolutely love it. I spoke with Dave at CoralVue when I was thinking of purchasing mine. He actually talked me out of the more expensive external model. Mine is running on a 120g that will eventually be heavily stocked. So far it has been impressive and much more consistent than the MSX. I had nothing but trouble from the Sicce pump on the MSX. The Bubble Blaster pump on the XP-2000 is a dream. I would highly recommend this skimmer to anyone and feel that it is easily one of the best bangs for your buck in the skimmer market. You definitely got a lot of value for your dollar here.