It depends on your eyes for the calibration and those are inconsistent. A hardware calibrator is a must.
I'm using the Huey by Pantone, which doesn't allow my eye to make any decisions (except choosing presets like "Photo editing" "High contrast, warm tone" etc.
But I still think it is pretty good.
It also adjusts to the roomlight, so if you have slightly yellow wall paint, it is good that the Huey adjusts to the roomlight color.
What do you think, 61Dynamic?
PS: I just saw, on another thread, that the forum expects an introduction from every newcomer. Is that right? If so, I guess I missed out on that.