Yandex Reviews 

In Almaty, Kazakhstan, you can flag any willing driver to ask for a paid lift. While these rides are a lot cheaper than regular taxis, they can be iffy, since the driver might not know how to get to where you want or simply does not want to go out of the way. So, I specifically chose a Yandex taxi when I wanted to go to a theatre performance at a venue I'd never been to.
I showed the driver the print-out of the two theatre tickets with the name of the theatre and the address (all in Russian). He drove me and stopped someplace and pointed to a building and said that's where the theatre was. Although there was no sign indicating it was a theatre, I knew that the theatre I was going to was a small operation (German-Russian plays) and since it is normal here for large buildings to have multiple facilities in them without any exterior indication, I paid the steep taxi fare, got out
and walked over to the building. Once inside,
I was told that there was no theatre in the
building. When I showed the ticket, I was
told that the street name on the ticket was
different from the street where we were. By
now, the taxi was gone. The upshot was that
I was too late for the play and my two tickets
were lost money.
When I had a local call Yandex for me, he was
told that Yandex had protection for their drivers
but no protection for customers when their drivers err. In other words, 'tough luck, buddy.'
A long time later, I found a contact for Yandex central (I think in Moscow) and wrote to them. I did get an answer, but he wanted the specific taxi driver and date. Of course, I didn't know the taxi number or the driver's name, and by then I did not have the useless theatre tickets and didn't know the date any more.

I like Yandex's taxi service. It actually not expensive at all.