The Star Trek experience was truly amazing, and not just because I am a trekkie. Being able to hang out with my friends and be transported to a totally different place all together was one of the funnest things I've ever done, and I know I'll be back!
I'm definitely a superfan of Sandbox. I've been to the San Mateo location a bunch of times and can't wait to check out the SF one. For me, while I've tried all of the current and recent VR platforms, this was the first experience where I didn't focus on the limitations of the hardware and felt truly immersed. I think this is due to a combination of the custom VR software and hardware, the fact that it's a social experience with your friends, and the compelling games that keep you entertained and engaged throughout the experience. If you haven't tried it, go out now and do it.
I had an opportunity to try Sandbox just this past weekend and it is like nothing I've ever experienced before. This is the best VR experience that I've ever had, and our entire group had a blast. It's like visiting the future! :)
I've historically been sensitive to being in VR for too long, getting motion sick. With the hand and leg tracking, I didn't experience any motion sickness in a 30 minute session. The trick is being able to see your hands and feet move naturally. I played wth some people new to VR and it blew us all away in different ways.