I owned a version of these in Japan which weren't bad (nothing like as good as these, though!) and I though I would give them a go here. The first thing to say is that these have a much better selection of brushes, fine, medium/bold, wedge. The fine is very fine, the med/bold is surprisingly versatile and the wedge is great for the rest. The amount of water they hold is about right, also the weight distribution and balance is good, and the caps are thankfully wide enough to not trap the brushes every time you replace the cap.
I recommend you use these with the Staedtler 'Noris Club' water-soluble pencil crayons and I can't imagine how you couldn't be impressed.