I'd like to think I know my car detailing products. I have some classic cars so I'm VERY picking about the products I use and have done countless hours of research on various products and have shelves of products that I've tried.
The word on Top Coat F11 is that it's OK, but not worth the money. It's essentially a sealer/detailer, but I feel that there are better products that can fill that space and provide better results and longevity. They made a name for themselves by doing some relentless marketing on FB and other platforms, but I feel comfortable saying that on the car detailing forums that it's not a product that is taken very seriously. I don't know a car detailer that uses it.