This is a very common question given the 10x increase in price. There are really three areas where GoSurfAssist offers a significant improvement over a manual surf device:
Performance: The design of the GoSurfAssist tab intercepts more water, which means you will get a better wave with more push and energy.
Adjustability: A manual surf device is mostly just on or off. With GoSurfAssist, you can vary the position of the tab from the dash of the boat which allows you to change the shape of the wave.
Convenience: The analogy we use is that it's like the difference between using a portable ballast pump to fill and drain bags, and having a fully automated ballast system that fills and drains from a switch on the dash. Once you experience that improvement, it's a game changer in convenience.
Whether or not that advantages justify the cost is up to you, but that's what you can expect to get with GoSurfAssist.
Contact a product expert if you have any other questions about GoSurfAssist.