Currently I'm using DX3S before I face glitch issues when the battery goes below 6V on the screen, at this instance it is difficult to control the car at the tight race track, However I solved this issue by using the new energizer lithium battery, they last very long, approximately 2 months if your racing once a week before the voltage drop down to 6V.
At one instance I my friends 4PKS on my JQ, It was a lot more precise and fast than my radio that is the reason why this is almost 2x more expensive. now I look forward of buying one.
The signal of DX3S also does not reach that far compared with other radios.
If you intend to use this on race track and compete in racing invest on higher end ones you will feel the difference later on.