I started PN at the beginning of 2007, and have been doing Cheat to Lose the past couple of months.
I think PN is a great program that will teach you how to customize your nutrition to fit your particular needs.
That said, for me the general PN guidelines are too carb restrictive and spreading the cheat meals over the week instead of all on one day doesn't achieve the same leptin benefits. I enjoy Cheat to Lose more, and have for the first time been able to get to single digit body fat with it.
My recommendation is to try both, and adapt the best of both programs based on how your body responds.