I just bought a p4 and have a yuneec q500 for like 2 months I've never opened the p4 did I make a good purchase?
I have fond memories of my Q500. It was a good trainer, dog slow though. Max speed was 15mph. I felt lucky to find a buyer to sell it to. That took me about 6mos to unload it after I bought my P3P, July 2015.
As for the P4, it's far beyond what the Q500 can do. Even the P3P is way beyond Q500, like 2 miles beyond. Q500 range sucked because it uses wifi for communications. You might get 1800' range. I remember it would take forever to reconnect when losing the connection on the fringe limits, like 30 seconds sometimes. DJI lightbridge reconnects in seconds when you get a disconnect, because it's not using plain ole Wifi. Just ascend and the connection comes back quick. Just the settings option on the camera in DJI is years ahead of Q500, which has virtually no options to set color, contrast, speed, gimbal speed, expos, smoothing, all kinds of stuff the Q500 never even thought of including IMO.
The best advantage over Q500 is that Phantom's are backpackable. Oh man is that's convenient for travel and storage. The Q500 you have that huge hard case to lug around all the time, a true PITA.
I'll warn you, the P4 has a weak controller, the GL300C. You might get a mile range, sometimes less (in town). If you upgrade the antenna with a DBS2 Itelite, that will improve your range. You can also buy a GL658A or C controller for the Inspire, and that will take you past 2 miles with a windsurfer, which is what I fly with.
An older P3P with GL300A controller will go past 2 miles range. If you buy a used one of those you'll be happy, in comparison to Q500. I have one for sale if interested. But the P4 is a nice craft, and it's fast, 40mph without OA enabled. However, if you enable object avoidance, the craft is slow, around 18mph. DJI says it will go 22mph, but that's only when RTH is enabled. The
P4P will do 30mph with object avoidance enabled, which is the optimal speed to maximize flight duration and distance. So if you can afford
P4P, that might be a better value, given the 1" sensor camera it sports.
Then the issue is finding a good
P4P, as their quality consistency is 50-50 crapshoot IMO. I love DJI, but man oh man, their quality needs to improve. They're still dealing with simple things, like cracking plastic. You've got to have patience with DJI, but when you get a good craft, flying it is addicting.