I've been thinking of trying this service instead of regular cabs (Atlanta). Are the prices comparable or is Uber typically more?
Is the tip included in the rate or do you pick that upon arrival on your phone?
I can only comment to their prices in Boston and New York.
Black Car service costs about 1.5x or 2x as much as a cab does. However, for that you get to ride in a nice big black luxury car, with a driver in a suit who opens the door for you. In the past, I have ridden in big Cadilacs and Mercedes sedans with this service.
UberX service costs about as much as a cab with tip would cost. However, for that you get all the other benefits of using this app (phone confirmation with the driver, no tip, no handeling of cash, up-to-the minute estimated time of pickup, etc.) In the past, I have riddeen in a Prius and a white BMW 3-series sedans with this service. I know they also have a Tesla Model S around here for this service as well sometimes.
If you chose to sign up, use this link to get $10 off your first ride:
https://uber.com/invite/0evoy
Boston people can get $25 off their fare to the South Shore using the promo code:
bossouth