Not a lot to say other than these things are great. The quick lock and release mechanism is very hand. Possible a little inconvenient with triangular truss as the cross braces can get in the way of the latches making it a little difficult to release. Probably never going to happen, but not sure of stability of them if used to hang truss upside down... obvious as they're for stands, but just in case you have any ideas!
Makes putting the trusses on on your own very easy as you don't need to lock them in to place, it will just slot in and hold on.
Good sturdy construction where even the plastic bits feel high quality.