We used the Hydra Hoist when I worked at a marina. They work OK until something causes a leak in the lifting chamber. It was my experience that they required a lot of work. Also they required a lot of balancing to fit the boat. I notice that the pictures of the new ones look more advanced.
We never used the soft inflatable air docks. They look as if they would be a lot easier to use, but leaks might still be a problem.
Seventy years of chasing the elusive sunfish.