Everything is fine if you fly out, but upon arrival, you are greeted by a crowd of taxi drivers who are ready to take you to Tbilisi (5km) for 10k rubles. Don't drive. There is a bus, there is an electric train, in the end you can call a local BOLT taxi, which will cost many times cheaper. Sim cards of a local operator are sold at the exit, they are cheaper to use than roaming