too expensive, taking a taxi would literally cost me galf the price. And thats for the economy option

I never get the SMS code to access the system. I guess it's because my phone number is not Bulgarian. However, there is a selection drop-down where you can choose a phone prefix from another country,so that should be allowed in theory.

The cars are not new and shiny or clean but hey, to get you anywhere in Sofia for half the price of a big name taxi, why not. They do the job just the same.