I have perfect acuity, as it stated...lol
on a Dell Inspiron E1705
Uncalibrated monitor ( Laptops are always bad..lol)
Although i've used the X-rite system, I've only found it to work REALLY well with a calibrated monitor....( duh...lol)
Otherwise, you're fighting back and forth with it's profile and your monitor's profile....not good.
I've used it on Mac's...and found it to work just fine.
It's just a tool! If it doesn't work to your liking, either get a better rig or stop complaining. It obviously works..as many professionals use it...studios...printing labs...it works!
And here are screen shots to prove I have PERFECT ACUITY..lol