These are outstanding in quality and match up perfectly with Sori Yanagi colanders.
In fact, you're not doing yourself any favors if you're buying just the bowls without the colanders (unless you already have the colanders). The combination of the two makes almost any cooking preparation task that involves washing produce substantially easier. The more you use the two - the more additional uses you find for them.
Being all stainless they're dishwasher safe.
There are two things however that some people find a bit irritating - the bottom of these bowls isn't very wide. Which means that when they're heavily loaded with food and standing on a slippery counter, such as a granite, they will slide easily and may seem to be unstable.
The top lip is narrow and this creates a resting "rim" for the colander. That way there is a space between the outside of the colander and inside of the bowl when the properly sized colander sits on the appropriate bowl. This allows the water to drain into the bowl. Without the colander though, when used just for mixing (or making dough), the narrow top lip may appear to be less convenient at first.