we bought two of these for our live show, we needed to be able to mount projectors safely and precisely for some custom visuals. We already had 4 speaker stands, so we tried these out. They are incredibly steady when mounted on a good speaker stand, so long as you tape down the projector and the cables, this is not going anywhere!
When not using them at shows, they make a great 'instant table' for accommodating audio interfaces, samplers, extra monitors etc. in our studio. Once again, the cabling needs to be cable tied with velcro ties to the stand, but it makes a standing (rather than sitting) workflow possible—which suits our style perfectly! It means all of the studio elements (audio interface, mixer, monitors, mics) can be arranged within arms reach for fast and efficient tracking — hey, I might buy a few more!!