It works well in Germany. For products too, at least what I tried. The last time I did a very German product search (association-management software) the first hit was a comparison on golem.de, which is pretty solid.

I find myself adding a !g bang when searching for products in the Netherlands, only to find out that the Google product results are NOT better than Kagi's

It probably depends on your country, and what you are looking for exactly, but it works fine for my needs

Using it in France: yes, it does.