These mounts are excellent quality and mounted up nicely to our prinsu rack. We are able to throw our Roam cases up within minutes and have everything we need to hit the trails. We chose these mounts for their convenience in loading because we don't leave our gear on the rack 24/7. We also wanted a secure way to lock the $400 cases to the vehicle and deter theft when on trips without drilling into the case itself. For these two purposes these mounts are rock solid.
Here's the dislike. At $200 a set these should come with a way to lock the mounts themselves to the rack and deter theft when cases are not attached. At the very least a set of security hardware to make it more difficult. Anyone with a 10mm socket or plyers can take these in about 1 minute when the cases aren't attached, and at $200 a set it I would like a little more piece of mind so I ordered some security hardware myself.