I have been using the 360 software on two upgraded V6s for some time now and find the software completely stable even if it is missing a few bells and whistles compared to the V6s. Software upgrades are rolled out regularly - it feels like every month although I have never measured the intervals - so I fully expect to see these bells and whistles (patents permitting) arrive in the future.
I received the remotes for free when I applied to switch and the switching process itself was quick and easy with no glitches. The remotes and especially the GUI are a big improvement on the V6 and I am pleased I switched.
Upgrade done today, so far I'm very impressed. GUI and remotes are a big improvement. Very slick navigation wise. Picture is great as well as the sound, (no sync issues and all the tv's and soundbars controlled properly by the new remotes). TBH it makes the TiVo software look and feel very clunky in comparison.
Glad I've done the upgrade now, even the Mrs prefers it to TiVo and loves the voice search.