It's an old restaurant, and also famous among Thai ppl. Delicious and clean enough even for being a representative of Pad Thai from Thailand. Price is a bit expensive comparing with with another local restaurant but it's worth to pay, especially the orange juice. It's 100% real orange juice!!
This restaurant information is also shown in the guide book of Bangkok, Thailand. And why should you miss it?
You can visit the Golden Mountain before coming to this restaurant as it's nearby and then go to drink and chill out later at Khao San Road.
Mon-Su: 18:00-03:00