I've had one okay experience at Thai Lahna and one pretty bad experience.
The first trip, my friend and I received our food promptly and it was good. I had the pad kee mow and it was tasty and the serving size was large enough to have a take home box. The service was nothing to write home about but it wasnt awful.
The second time I came with my husband, the service was deplorable. It took us 20 minutes just to get a glass of water and an acknowledgement of our presence. My husband ordered pad see eew (I'm so sorry I don't know the correct spelling, I'm just going phonetically here) and the waitress told him that they didn't have it. It's a pretty common thai dish so he asked for it by a different name, like drunken noodles, and she said she didn't know it again and only knew "the number" - common for restaurants with hard to pronounce dishes. She said she didn't know the names of the dishes, she just wrote down the numbers. She was really short with us and basically belted that if it wasnt on the menu they didn't have it.
She then asked her colleague to come over to our table to again point out that they don't have the dish, and began speaking over our table to each other in Spanish.
She then left for 10 minutes when someone from the kitchen staff came out. My husband asked again for the dish he desired and the staff member knew it immediately and put in the order.
I can understand a fresh server and someone who isn't as familiar with the menu, but to be put on the floor with zero training and to be so rude to a customer really blows my mind.