I have eaten at Silom 12 a number of times now, and I'll definitely be going back for more.
I give them high marks for their customer service due to their knowledge of which dishes are gluten-free and which ones can be made gluten-free. My go-to dishes are the green papaya salad (so delicious ๐) and their panang curry with shrimp. Its richly flavored broth is spicy, but not scorching. They can make it hotter for the more adventurous.
The one dish I tried but didn't like was their Basil beef. It was one of those dishes that can be made gluten-free by substituting the soy (or oyster) sauce. It wasn't terrible, but I won't be ordering that again.