We have had our Hensley since 2001, I won't tow without it. (The ProPride is the "new and improved" version of the Hensley, it has some better features but the design principle is the same.) I take the TT out in soft sand on the beach, terrain doesn't get more uneven that that. You will see on the highway when you get into construction zones with uneven pavement on the Interstate, that the 3P will give you superior control over the trailer, even as the truck and trailer lean in different directions.
Hitching looks complicated, but after you do it a few times it's easy. There is only one downside to either the HA or the 3P, and that is the cost.