This shop is associated with 27M shop, also near Saphan Kwai BTS. It’s very easy to reach. Take exit 3 and when you get to bottom of stairs walk less than 50 feet and turn left after passing 7-Eleven. Shop is on your right down short alley. Reception is on second floor and rooms on third and fourth (all stairs easily negotiable). My first impression was that it was very clean and well maintained. I arrived without advance booking. Although they have scores of guys on website, I was sho