Having eaten sushi at most places in Chicago, and at many places in the world (including Japan), I can't rate Itto Sushi very highly. I have eaten here twice, and in each instance, was amazed at the sushi-san's demeanor and lack of skill.
They claim to have the freshest fish, but since every sushi place (except for one that I know of) buys their fish from Rainbow (the Moonie operation that has cornered the market), it's a false claim. The fish was adequate...some had been sitting around too long, the rice was sticky and somewhat pasty, and the sushi-san was completely inattentive to what the sushi bar patrons (including my Japanese companion) were asking for.
Furthermore, on both occasions, they were out of many fish. And despite my continued asking about kani (ie, crab) and being assured that they did have it, they still served me the fake crab! Arrrghh.
Pros: attentive waitress
Cons: poor fish selection, aloof sushi chef, poor value