ChromaPure is easier to use? No disrespect intended, but you could easily teach a guy from Mc'Donalds to use either of these and do a decent job on his first day. Basically you just load a test pattern on the TV / projector screen and play with the built-in display controls until the charts look nice. These devices offer direct adjustments for some points (some grays and primary(+secondary) colors) with tri-axial controls at max, it can't be more simple. Yes, it requires a lot of human work with the remote, even if you use the CalMan interface as a remote on Panasonic TVs and such... and may be requires a little bit more understanding of display devices and colors than a fully automatized PC monitor calibration but it's still a 'technician' job where you can be "professional" after some hours of a simple course, not real science or engineering... (again, no disrespect, but truth is truth...) I personally find CalMan annoying, I hate that I need to use it from time to time because it's a lot faster for TVs and "theatrical" with the interactive colorful graphs and everything (regular TV users like that stuff better than staring at a command line and get a plain excel worksheet with some dummy graphs at the end...). But the same goes for ChromaPure. I don't think there is a real difference. I just prefer CalMan because Spectracal is a bigger company with better relationships and thus better "industry standard" support (various instruments, video processors, display devices without open standards). But it's safe to choose either of these, just pick what you feel better.