My co-workers and I were working in the Charter Oak area and wanted some Thai food for lunch. We came across Lucky Elephant down the street in San Dimas. The first thing I noticed about Lucky Elephant when I walk through the door was the Thai style roof over the booth area. The whole decoration of the place was really well put together.
We had to wait a few minutes before the waitresses realized we were waiting for a table. Other than that the service was great. They even stopped by and ask if the food was okay (I like it when waitresses do that).
We ordered the Chinese Broccoli and Crispy Pork (one of my favorites), a bowl of Tom Kah Kai soup (Chicken Coconut Soup), BBQ chicken, and Pad Kra Pow Beef (aka Mint leave beef in some restaurants).

The Broccoli and Crispy Pork was great, the crispy pork were cut to perfect size and the sauce was not too salty like some restaurants.
Tom Kah Kai was also good, it wasn't too sweet.
BBQ Chicken was just okay.
Last but not least was the Pad Kra Pow Beef, which was made with ground beef (the way it's suppose to be made). Overall flavor of Pad Kra Pow Beef was "good" (better than a lot of place).

Break Down:
Food = 5 Stars (Lucky elephant tries to be as Authentic as they can and I applause them for it.)
Ambiance = 5 Stars (Very nice design, almost felt like I was eating outside if you minus the sealing.)
Service = 4.5 Stars (They would have gotten 5 starts if they didn't blow it at the beginning.)