I got my Vive on Saturday and hooked it up in my office while waiting for some long cables to run it out to a larger room. I had played previously, but this was my wife's first experience. She loved the dog environment in The Lab, as well as theBlu. About four times that day, she asked if she could visit "Tuber," which is what we've now named the little dog.
Yesterday, my mom and her husband came over for Mother's Day. My mom was blown away. It really is very enjoyable to watch people experience VR for the first time. They're like children, except fully developed mentally. Basically ran her with the same stuff I demo'd for my wife, as well as TiltBrush and the Cloudlands demo. She couldn't get enough of it, and said she wanted her own, until she found out the price (including buying a high-end PC).
Last night after they left, my wife asked if she could jump in and visit Tuber again. Then she told me to leave and not watch her play, so I went back to setting up the main VR space. While I was doing that, she played through about half of the Lab games, and is now getting pretty used to the Steam interface in VR (she's not really a PC gamer that much).
Can't wait to demo it for more people, and to get some more content.