A friend tried this in 2015, with Devils Den. In those days if you choose the girl, its 7500, if they chose you its 5000. He hated the experience and regretted it for a long time. Looks great on paper but not recommend for 2 reasons:
After a long haul plane journey the last thing you need is to clear the customs, collect your bag get into a car with 2 birds all over you.
Second, value for many apart the back of a car with 2 girls is just a faf. You'll hardly enjoy it.
My friend just realised his mistake after departing and a hesitant attempt to bj from one of girls, ( sweaty balls the dude just spent 17 hours in a tube) he realised he'd rather have a rest may be a nap. They left him along and dropped him at hotel. I would've booked it after staying in Bangkok and on my way to pattaya, yes. You are then well rested, fresh and Kamagra in your blood, even then, at that price, I would rather have 2 birds in my hotel room and at the back of a car.