DU sushi aficionados; explain UNI to me

[Ediacara]

So tonight, my boyfriend and I went to a sushi restaurant. A restaurant that came highly recommended and was fantastic. The kind of restaurant that I would actually order uni in.

To describe it as possibly the worst thing I've ever eaten, would be too mild. I wanted to spit it out on my plate right in front of the waiter, the chef, the chef's wife, and Madeline Albright (who by bizarre coincidence was at the same restaurant, no I didn't meet her). I didn't spit it out, but I wanted to with every fibre of my being.

The texture, the flavor, the heaping pile of it. All of it: horrible.

Is there something I'm missing here?

ON EDIT: I should add, I really enjoy sushi, and eat it probably once weekly, but it's only rarely that I'll go out to an "A-list" sushi restaurant, generally, I go to an Asian grocery.