Based on the outward appearance of this place, you would think it's rubbish. And you'd be wrong. Uni sushi serves some of the freshest, tastiest sushi on the south shore. It's excellent. I was extremely impressed.
Keep in mind that it's not Japanese owned, so it's not a classical sushi place that specialises in sashimi, Uni tends to do fusiony things like rolls, and they do them very well.
I've only eaten there once because it isn't exactly in my neighborhood, but I absolutely recommend it.