Takara is okay. It's a solid three stars. I don't find anything phenomenal about it, but there's nothing really bad, either.
I've done takeout a few times from Takara, and I've dined in once. Out of all of these experiences, my least favorite was the dine-in experience. The service at the restaurant was a slow, even though the restaurant was not crowded, and the restaurant itself was extremely cold. I avoided drinking my water simply because it would make me even colder.
We ate at the restaurant on a Friday night during the 7 o'clock hour, and maybe a quarter of the seats were even filled. I doubt that can be a good sign.
The sushi at Takara is pretty good, although I've had a some rolls on a few occasions that I felt smelled and tasted a little fishier than good quality sushi should.
There are several places in Madison that offer a better dining experience -- as far as the service, restaurant atmosphere and sushi quality altogether -- when it comes to sushi. Takara isn't bad, but it just doesn't fit the bill for me.