Anyone with advice or travel tips to get from the airport to Athens Ledra Marriott during the morning / afternoon?

I understand there are several express buses that are available and also taxis.

Does anyone know, If we decide to take a bus, which bus or buses do we take to get to the hotel? or.. how much will this cost and how long is the ride?

Are the taxis the best option? How much are the taxis and how long will that take?

thanks....Brian