Great food, great service friendly atmosphere. I was so excited to try this place on my last visit home. I have heard about it so many times and can't believe I never tried it sooner (like when I lived in Vegas), however I finally got my family (boring eaters) to finally go!
First off this place is really crowded we called twice about dinner but were told they were booked and would mostly likely have to wait an hour if we decided that we were going to just show up. We ended up going for lunch because we figured it would not be as crowded. It worked but I still suggest calling ahead.
Out of all the thai restaurants I have eaten at Lotus of Siam had the greatest. They had a large selection of main dishes, soups, and salads. Most of the dishes could also be made vegetarian. In addition to standard thai dishes they also offered a selection of Northern Thai food.
I recommend the spicy vegetable soup, basil and chili tofu with mixed vegetables and the panang curry.