I am experiencing some of the same things that some of you mentioned. It is working very well to release the boat.

More often than not, I get the boat lined up but have difficulty getting it to snap in. I typically get it on the device, exit the boat then winch it in until it snaps.

This boat is powered by a 25 hp outboard. It just doesn't have enough torque to push it up on the receiver the final few inches required to get it to lock in. I plan to try adjusting the winch stand again. I have varied the depth of the trailer multiple times without consistent success in getting it to snap in.
I haven't given up on it yet. 8-)