Vic, we've been using Uber in Vegas for the past 5 years or so. As Kevin mentions, we've had very occasional headaches (the software canceling our ride, billing screw-ups,etc), I'd say maybe 5% of the time, and those problems have been quick and easy to resolve in the app. Yes, there's that annoying surge pricing, where the same ride can be $14 one day and $50 the next. Overall, though, Uber has been about 30 to 50% cheaper than a taxi, and there's no concern about long-hauling (in our taxi experience, they've tried to long-haul us at least 30% of the time). Some people prefer Lyft over Uber, we haven't tried them.
At the airport, the rideshare pick-up area is in the parking garage, I think on the 2nd floor, signage is good. Once you're there, you order the ride, the driver arrives and texts you his/her parking space number, it's always been very easy.
Most hotels have designated rideshare pick-up areas, the conspiratorial, and probably true, story is that the taxi companies have insisited on that little bit of inconvenience. At the Strip hotels they're often far from the port cochere but not that much of an extra walk. At locals' casinos and downtown it's really no big deal at all.
For what it's worth, we used to use the bus a lot, it was fairly convenient and with plenty of local color. Wife has limited mobility now, so it's only an option if I go somewhere myself.