Other than it will take up a 1/3 of your small room it will be crazy loud if you want it to. It doesn't have much output below 30hz which for some is important, others not so much.
Compared to the ID brands touted here it lacks output below 30hz as stated but will certainly keep up with them in the mid-range 40-60hz or so. Lots of output if needed.
My room is 13x14 and wouldn't want a sub that big with furniture, tv, stand, speakers, media cabinet etc... but if it fits for you then enjoy.
Klipsch RF-62II, RC-500, RS-400, SVS PC12+,
Def Tech SC8000
Harman Kardon AVR 1600
PS3, Apple TV, Sharp 70" Qattron