Geetoo - the M8 is a great radio - if it wasn't, do you think Kinwald, Baker, etc. etc. etc. etc. etc. would be running it?
I know that I'm more than happy with mine. . .
work, just get that stupid little cover off and you can change freqencies all you want.
You change the module if you want to change the BAND of frequencies (27 band, 75 band, 40 band).
You've got a great radio, one of the best, period. Have fun with it!
RC10L2.5W - RC12.4 - RCNTC3(bmi) - TC4 (modded) - B44.2 - plus rent-a-rides! :D