Sonarworks Reference 4

So a young budding audiophile friend of mine brought his laptop over today and we took measurements and then corrected the freq. response with Sonarworks.

The difference was amazing.  My initial measurements weren't horrible and right in line with what I thought they’d be.  When we corrected the sound though it was far better.

The sonarworks software will be my next purchase.  
Is anyone else out there using Sonarworks or something comparable?