Experienced only: What have you done with room correction?

I've been using a Velodyne SMS-1 with a pair of HGS-15s to augment KEF Reference 1s with excellent result.  I'm going to try a second SMS-1 in a stereo configuration in which L & R from the Ayre preamp will pass to separate SMS-1s.  RS-232 will connect the SMS-1s so only one needs to be addressed for settings to be applied to both.

I've been using Anthems ARC for several years (as a dealer and consumer) and as long as you have the expectation that its not a cure all to the system it is a great tool to use. Getting into the advanced adjustments allows for fine tuning to my ear on my system. I also use REW to measure the before to see what the in room response is. 

I've used 3 different REQ solutions in my A/V systems:  Dirac Live, Audyssey MultEQ XT32, and ARC Genesis. I consider them all effective, to varying degrees, with respect to reducing room colorations and providing a more convincing audio experience, at least to my ear.

However, REQ is intended to remediate only room anomalies. It is not a panacea for speaker or source aberrations. And I've always found further improvements to the sound are possible via manual adjustment downstream. YMMV

I had a dedicated music room built. 

For somebody who does without even tone control, obviously automatic room correction is out of my league. Went with building a dedicated listening house instead.