VXD-720 has been disco'd, so it's kind of a moot point. It was really just a bridge product while the EVX series was being developed. You can do a quick search of this forum to learn more.
I use both VXD, and Mototrbo XPR 6350 in one facility, over 250 units. I've had lots of issues with channel selectors and volume power knob failures. I've probably had 20% go back for repair. We really don't utilize any of the advance keypad/display features on the VXD. Had there been a more basic VXD model available, we'd have gone that route.
I've got a smaller fleet (about 30 units) of EVX 531s in another facility. Had them in place less than six months, but initial results have been very good. No failures of any sort, but to be fair, they operate in a less demanding environment than my VXD/XPR fleet. As warranties expire on the VXD/XPR fleet, we may migrate to the EVX across the board.