Sorry, no experience with automatic boat loaders. I do have a 12' aluminum V-hull that I cart around in the back of a standard bed full size truck. It works well, but takes a lot of effort to load/unload between the boat and all the gear (motor -electric and/or gas, oars, seats, battery, fishing gear, etc. I have a 15hp 2-stroke that I occasionally use and it's a real bear to transfer from the truck to the boat and back when launching/taking out. The setup has served me well for the last 10+ years, but as I get older loading and unloading the thing gets more and more tiresome. I now cruise craigslist on occasion for a suitable trailer. If I was only carting around the boat/oars my current method is tolerable, but between the outboard, the trolling motor battery and other items, I've lost some of the motivation to go through all the effort and risk straining my back.
The only automatic boat loader I'm familiar with is the Eide which I think requires unloading all the gear in the boat before use. Not sure what type you've been looking at, but food for thought. Good luck on your decision.