Got my vive. Is awesome.
A few oddities/thoughts I've encountered:
In tiltbrush (which I adore), I often back up while drawing things, and more than a few times I've backed up into my television. The border of my chaperone has a decent buffer distance, but when backing up you don't really have much perspective that you're leaving the play area.
I also messed around installing random workshop things into my SteamVR environment. Though for some reason one of the user made things I downloaded just hard crashed SteamVR, and I was unable to even use my Vive until I worked out how to uninstall the content (by unsubscribing from it in the workshop). It's really weird that the SteamVR thing isn't sandboxed off from user content being able to crash it.
It's amazing how fast people pick up using the Vive, I've had people who have never played a game before in their life be able to start shooting things / simulating jobs / drawing 3d art, and they 'get it' instantly.
It's weird that in the room setup, you trace around the playable area of your room and it draws a little box inside, I was expecting the little box to be the play area games used, but some games seem to draw the outlined room as the play area instead. I felt like I was better served having a smaller play area away from doors and televisions, so I just made a 2x2 metre square in the middle which serves me well.
Coming from a DK2 though, I'm friggin blown away by everything about the device. The room scale stuff is monumental, the controllers are really nice and sturdy and have withstood a few hard whacks against walls already. For the first half hour I was a little concerned about the resolution, but honestly I don't even notice it now. Everything I've played, from awesome polished Valve thingos, to little early access prototypes, have been spectacularly immersive. The cable's a minor hassle, but after a few hours I'm already subconsciously stepping over it (and I do mean subconsciously - not even aware that I'm doing it).
I'm a little concerned that I should mount the lighthouses, since they're just sitting on shelves, but the tracking has been completely 1:1 so far. Performance wise, I'm not sure if my 970 is entirely up to the task, as every now and then I'll get a half second freeze frame, it's like... it's like the opposite feeling to jolting awake after falling in a dream, but just as mind-fucky.
Anyway, I expect to spend the next three days in a virtual reality coma, while simultaneously trying to force language crimes hip new VR lingo into the lives of the "realies" around me.