I’ve only had my new 788 out once. It seemed to find satellites as fast or faster than other GPS units I’ve used. When traveling up river it was updating just fine, as long as it wasn’t “zoomed in” too close. When I had it zoomed in it was drawing a lot of extra detail and that takes more time, so it would logically update slower. But when it was set to 100 ft or something it was updating just fine.