I'll recommend Welcome Taxi for the following reasons: 
1) The e-mail and SMS communication were swift and timely. 
2) The rates are reasonable 
3) Child safety seats were available for our 2 children. 
4) We were picked up in the right time at the right place. 
5) The car was in very good condition 
6) The driver (Igor) was driving in a safe and non-aggressive way