Siam used to be one of my favorite restaurant. I think "used to be" may be a harsh phrase to use. I still like their food. However, I noticed they have gotten smaller.
Their Phad Thai noodles is one that I always recommend to my friends because not only does it taste good, it also has a lot of serving.
Even with the photo, you can tell that the serving is pretty small. My wife and I were disappointed when this was served to us recently. Oh how times have changed.