I have now been to Cowfish several times, and I must say that it has been well worth it. It's a great place to meet friends after work. The crowd does tend to build the closer to the lunch and dinner hours that you get, but if you arrive say an hour earlier than that, you are sure to get the stool or booth of your choice.
The sushi is superb and of the highest grade. The only con I have is that their individual portions are a bit on the large side, and those of you who don't want to stuff your face with every bite may want to either cut them, or perhaps just ask for smaller pieces. Either way, this is one of my favorite places in the area!