RE: Polk's Hobbies radios?
I got back into the hobby a few years back and decided I needed a new radio. The Tracker III looked like it had the most bang for the buck by a long shot. If that radio had delivered, I would have been very, very happy.
First time I flew a plane with it, the plane made it through the take-off and then crashed straight down into a field full of sheep, (those things move very fast and make some very unnatural noises when an airplane dive bombs them, for info.). I sent it to Polk's, they sent it back and said it was fine. I was not able to get a decent range check on it after the initial one before the flight into the sheep. I kept getting glitching at about 25-30 feet, using their Rx and a Futaba Rx. So, I sent it all back for a refund.
There is a guy at my field that uses a Polk's Tracker III, but he only flies small foam electric airplanes with it.
I have ZERO faith in Polk's radio systems; however, their cheap ESC's seem to do very well.