The only issue right now is that JR Americas may not be up and running again and able to do the upgrade. The ONLY advantage to DSMX is if you commonly fly places like Joe Nall where literally hundreds of models in the air at the same time. You also cannot choose to use DSM2 which still has the power brownout indication and the Frame Loss/Hold information is much more accurate. If I had it to do over again, I do not think I would do the DSMX upgrade.