i haven't had any issues , but McDuff is a smaller track and we maybe have a dozen to two dozen peoples actively driving RC'z at same time wether on race track or practice tracks. As well as a few dozen crawlers on the crawler tracks. With Flysky's Ant protocol interference is avoided actively. It has <20dBm of power output but because it can operate with between 3.5v to 9v this can vary greatly. I definitely found that the 300m range and <20dBm power output can vary with the input voltage and so I use only high quality alkaline batteries when racing versus my rechargeable LiOn or LiPo honebrew radio battery packs. No matter what type of power cell used, the voltage should be upwards of 9v rather than the lower voltages it can operate with for maximum performance of distance and power of signal. This also stands true for the active interference avoidance tech, more voltage equates to faster freq hoping and avoidance tech performance.
imo but based on personal experience, Lol.
...still love my Futaba radios more, but for the price I've really enjoyed the G7P, no issues and I replaced the wheel with very nice Alloy w/Foam wheel fr0m AliEx and changed the disply LED lighting to blue and added LEDs for background lighting for trugger and some buttons, wrapped the handle with good quality tennis racket tape.
I hope any of that helps.... (-_•)