Dishes are just about as authentic as you could possibly find outside of Thailand. This little hole in the wall place in the heart of Hollywood has withstood the test of time and has maintained its unpretentious offerings of food and atmosphere as it has for years. The quality and taste have been consistent, service is usually quick and courteous. Most items on the menu are as downhome as you would expect in Thailand. Prices have also been kept quite reasonable for the quality of food you get.
Overall - very positive experience if you prefer a genuine, no non sense place to have good Thai food without all the fluff. Not sure if it is an only "cash only" place; we usually just pay cash.