We are in pinklao not far from the historical center with buses 203 and 56 stoping in front of The Overstay. we are on the main road of charan sanit wong near and on the same side of the soi 40. you can go on google map and look for the overstay to get a better idea (or print the map)
Tips for people coming from The Airport :
Only get into a cab with meter and it should cost no more than 400 including the toll way (70 baht).
My way is go to the departure level and jump into a cab that just sent someone , you save 50 baht of airport surcharge..
Bus 556 (1 hour)cost only 35 baht to come from the airport. Stop at Pata pinklao and walk to charan soi 40.