bought the $1500 pro 4, have had a **** of a time updating once, finally got it though. and now a 2nd update took many hours and many tries. seemed to be updated. kept getting the no signal problem, had it hover and then it went beserk on me crashed into the floor and wouldn't stop. broke 3 propellers. seems to be somewhat okay other than that. but this no signal issue is ridiculous. the updates failing over and over are ridiculous. i'll never buy from dji again