I wouldn't call this Room Correction when it only handles frequencies up to 500hZ. That is limited bass correction. Now it is quite possible that in many rooms this may be al you need and as you note the price is not too high to give it a try.
: Ayre KX-R
: Meridian 808v3 & Meridian MC200 (SooLoos)
:SME 20/3 , Audio Research PH 8
: Wilson Alexandria X2 Series 2
Transparent Opus SC, Reference MM2 Interconnects & Powerlink MM2x Power