Not yet. Mine was rebooting like mad last night plus I had annoying echo on some calls, but this morning it seemed to be fine and didn't reboot while I was out for several hours this morning.
Saying "Sprint" doesn't sound right, but IIRC the OV & MT would occasionally get spurious updates(nothing there actually), but I suppose that it's possible that the Vs will need a further OS update to properly integrate with the VM subnetwork... just a guess given my activation problems and the 2nd level support guy mentioning that it was their system that wasn't quite ready for the Vs yet. (Online swap failed for me, so I had to do by phone.)
The Anker 3500mah batt + back cover that I ordered came this morning so I'm charging that up ATM, and then will further test for echo/reboots -> exchange @ BB o.w. I'm good to go.