Uber has a rating mechanism. They do not have transparent pricing and have a history of building tools to misrepresent their activities to legal authorities so nobody can trust them not to play games with pricing at any time in the future.

Better than cabs were 15 years ago but we should expect more transparency.

Neither the pricing nor the rating are transparent. They're just kind of transparent, and you're relying on trust in Uber.

I trust Uber somewhat more than a taxi driver. So far Uber's worst to me was rides not showing up, with taxi drivers I've been essentially robbed (and in most of the world, that it was only "essentially" means I had a not so bad experience).