I'm looking into a remote. My boat has no stern docking station. There is simply no rear visibility from the pilot house, which means backing is done blindly. Even at idle reverse it is irresponsible and dangerous if one cannot see. Going out to the port or starboard sidedeck by the pilot house takes one away from the controls, and visibility to the stern is by no means 100%. I do have cameras. They help a little. I do have a "mate," and we practice and try to dock calmly and using the radio headsets. My mate gets nervous and commands like port or starboard, reverse or ahead, morph to stop now, hit it forward, hard left and sharp right, oh God, damn it and so on. Usually in a breathless or terrified tone. We have practiced a lot but spatial judgment is not her strong suit. The wireless remotes have the advantage of permitting me (the captain) to be anywhere when docking: on one of the the sides, directly at the stern, the helm, on the back of the boat deck, etc. My boat has a very long foredeck with a high bow. Coming up to a mooring sees the mooring ball disappear below the hull line at 20 feet out. The mate tries to guide, but spatial relations are not her strong point.
The controllers are expensive, but if it does not work, I'll probably save a lot of money by not being in boating.