i had spektrum radios and the quality feels lower to me. plus a glitch/brownout issue on nearly every vehicle i had.
switched to the mt4 and I lLOVE it ! it is so nice, its worth it for the extra cash it costs and its not really that much. quality, fastest speed you can get, menu and controll is great! when I switched it was night and day. responce is so fast i was crashing into walls for the first 10 laps.!
you will have this radio for a Looong time, its gonna be like the real 1:1 car you drive all the time, ( something like a commuter or upscale comfort). worth it imo for the price.