I am not saying it is a waste of money but in order to get accurate results the  Hardware / Software solutions  that does this properly across all the profiles that need to be adjusted are well over £800 and the other versions are cut down to such an extent to make them in my view a waste of money.. Why would they produce hardware/software solutions for far less than this!

The problems I found include  proprietary loader thats used, lacks intelligence. It should  store the video driver version, resolution, refresh rate, etc. in a custom tag. Each time any setting is changed because the software does not  check these values at system startup. If they are not the ones the profile was built for, should pop up a notification dialog. 
A way to validate that the calibration data are written correctly to the video card during the measurement and profiling stage. A simple check of black, middle gray, and white will suffice. 

And also they should follow the ICC  profile format specifications. In cases where the V2 spec is more restrictive, follow it instead to maintain compatibility with older software. No more forgetting to adapt the chromaticity values to D50 or writing profiles with tag offset problems

Danny O'Byrne  http://www.digitalartzone.co.uk/

"All the technique in the world doesn't compensate for the inability to notice" Eliott Erwitt