Conti Ultra Sports are good for a cheap tire: reasonably durable, reasonably fast and smooth riding. Better than most other Contis I've ridden (especially GP's). And they do run close to nominal width, unlike most other Conti's I've used, which can be up to 20% narrower than the marked size (specifically, an old pair of Top Tourings, marked 700x32c, measured 26mm wide).
The Improbable Bulk
I have a pair of those in 27" that I haven't put a lot of miles on yet, but they seem to be nice tires. I would definitely use them for my style of riding, which is leisurely by most standards...
I don't know about their abilities if you are a more aggressive rider, but the rubber compound seems on the softer side of the spectrum (non-scientific observation) that makes me feel comfortable with their "grippiness" so I definitely like them. And I think about 20% or more of what makes a tire good is the rider thiniing they are good.
EDIT: My biggest point of agreement with the above review is smooth... and that's where I place my value on a bike tire.
Slow Ride Cyclists of NEPA
People do not seem to realize that their opinion of the world is also a confession of character.
- Ralph Waldo Emerson