Kona Grill 3051 Butterfield Rd, Oak Brook - (630) 515-8395 www.konagrill.com I have heard from a few people that the sushi was really good and I will agree the rolls are great but the actual Nigiri was pretty lame and not good.  I would say it was not fresh but I don't think that was the problem and think it was because the cut the fish and let it sit sliced and gets kinda dried out.   The rolls were good and the menu had quite a few fish on there that I bet were pretty good,  all in all it was decent but the place is not going to be very high on my list.