If you asked me 6 months ago what I thought about Hitec I would of told you they made great radios,but today I wouldnt recommend them to anyone. I purchased an Optic 6 last October and it worked fine until March. I landed my plane and the engine died and when I went to pick it up all control surfaces were shaking. I carried it back to the pits and it was still chattering (The transmitter was still on). I sent it back to Hitec for repair and they sent it back 2 weeks later saying it was repaired. I took another plane out did the range check everything was ok. I took off was flying around and after 5 minutes the plane flew away. When I got home I set up another receiver and servos and checked it out and after 5 minutes it stopped working the display was still on . Sent it back to Hitec and they sent me a new transmitter. While the radio was being repaired the 1st time stupid me I went out and bought a an other one. Well about 3 weeks ago I was flying around and the plane stopped responding and went in. At 1st I didn't think it was radio problem because when I picked up the pieces the needle vavle was missing and I thought maybe I had lost it flight and the engine died causing it to crash; the plane was a little heavy and you had to fly it all the way down, it wouldn't glide. Last week I was setting up another plane and notice the servos shaking, To come to find out if you tapped the back it would cause all kinds of h*ll. I checked the transmitter with the module from the other tansmitter and everything was fine. I called Hitec this morning and told them the problem and they told me I needed to send in the Transmitter with the module because they have to change the back case. Since I have to go to San Diego tomorrow I'll just drop it off in Poway.