I don't uber often, but when I do, it is uber great.
I live in a close suburb of the city and there are usually cars within at least a 10 minute window. It is a $12-$20 ride into the city. Nice drivers, safe rides. Who could ask for more?
I would like to add that I have never hit a surge time (when ride demand is up). I recently left the South Side at Midnight on a Saturday night, completely expecting a surge , but nothing.
If I had to choose a flaw in their great business plan, it is that I cannot request a driver, it is all random. (But this won't deter me from catching a safe ride and not having to find parking)