Hi, overall it’s not bad, but be aware that in summer the buses are crowded with tourists as many people want to save money by minimizing their travel expenses. I did the same thing as a student by the way. But now, when I arrive in Sardinia, I know that a GetTransfer https://gettransfer.com/en/directions/italy/sardinia driver is waiting for me at the exit from the airport Olbia-Costa Smeralda and from the very beginning I understand that my vacation will be very comfortable. In my opinion, a vacation should start only with positive emotions if I want them to accompany me during the whole stay.