I have only ColorVision Spyder3Studio, using it on my MacBaook Pro 17", it is my first and only calibration device, i didn't test many before to see which is better, but i don't know what is the benefit to use this calibration device, so if it for printing and matching it with the monitor, then all my prints came out perfect as i see or worse than that is i get prints better than what i see on monitor, and i sent few photos to our photography club [called society now] and they printed them, all are as i see in my monitor, so i can say that the calibration i've got working great, but it is also subjective, i heard many said they have problem with Spyder versions.