As an outside observation, Germans seem to make things better than they need to be in a detrimental way. For example, we redid one of our bathroom showers using the Schluter Kerdi waterpoofing system. They have very specific instructions on how to space the screws, how to seal the screws, how to seal the edges, how to mix the thinset, and probably some other things I can't remember off the top of my head. They put it through a battery of tests, including going under 100' of water. Who needs that? Don't worry about it.

This stuff replaces cement board, which isn't strictly waterproof, at least not on its own. It's also significantly more expensive.

I do think it's worthwhile for a home DIYer to get. The instructions are clear and it's less likely you'll screw something up that could result in disaster. That said, this thing is just waiting for a Japanese company to come along and make something 90% as good for 50% of the price. That's basically what happened in the German vs Japanese car market, and there's already some products on this market like that.