I had a P3A back in September of 2015, i had to return it due to LED housing came loose & began to rattle & was constantly getting all kind of errors, & RTH function failed to work on several occasions, long story short it was defective. I returned it a few days after purchase & received a refund. What if your opinion on getting a P4 @ $1399, 2x extra batteries which would bring me around $1600-$1700, or just buy another P3A or P3P, i must say the price for the advanced @ $750 & P3P @ $830 are looking mighty attractive. I have the money to buy either a P4 or a P3P/P3A, please any advice on whether the P4 is actually worth it in your honest opinion another $700-$800 opposed to the P3P/P3A, i really feel comfortable with the drone being i had some practice in the past, so i don't feel i would all that much use the P4's obstacle avoidance system, are there many other pros opposed to the P3P than that? Really what i am looking for is honest opinions if it is worth the extra money, thanks in advance!