I have a P3P that flys great but something has me itching for a P4. I bought my P3P roughly 10 days ago so I'm well within my return period at Best Buy. The two main things that attract me from the P4 is the active track feature and (this might sound dumb but its) the included carrying case. I hear some people say the P4 doesn't have the same range as the P3Ps do but that's not a deal breaker for me. I can barely get to 2800' before my signal goes out. I don't know if it's because I fly in a somewhat RF interfered area with a good amount of trees even though I always fly high enough to be above the trees. So someone convince me to spend the extra $400 on a P4 to help me make up my mind.