The 7px and the m17 have been discussed a lot.. as for telemetry I dont think one will ever find 1 that works as it should. as in give the exact details it is supposed to..I really dont us them al all. I have my rc vehicles setup with certain things to make sure I dont run into problems.Ive read multi thousand post just to go WHAT. Ive also purchased things others said where spot on to go Total junk..Ive never had a hit or miss SMC lipo ever had other be duds from unboxing.radios are all in the users hands.