WOW
if you have followed this thread YES Spektrum unfortunately missed a software error in the first batch of unit for the M8. There have also been some "buttons" that do not allow the binding process to begin or finish. They have also published what the problems are and are upgrading the software for the both transmitter and tranceiver units with very quick turn around time. but due to the demands when a bind button problem is found they are replacing them as soon as they receive more from manufacturing.
but to blast the product because a few units have a problem
locally we have quite a few now using the Spektum systems and all wearing smiles

i am using the JR R1 unit and it hasn't given one slight problem over the last three weekends of racing.
i believe the Spektrum has been a welcome addition to our hobby