4.5 stars, but I'm feeling generous so I'll round up.
Silk Elephant is quite possibly Squirrel Hill's busiest restaurant, and for good reason. In the rather crowded market for Thai food in Pittsburgh, Silk Elephant delivers on both ambiance and food. The space exhibits beautiful yet subtle decorative touches, and while you may find seating and table space a little cramped this doesn't hinder the dining experience too much. Although some of the servers lack fluency in English the service is attentive, and my picky dining companions' multiple, borderline irrational requests have all been met with skill.
I enjoy Silk Elephant's extensive menu of Thai tapas, as everything manages to taste different even though not all of the small plates hit the mark. The Salmon Rolls are fried properly and packed with salmony flavor, and similarly the Curry Puffs offer a perfectly flaky crust and a delicately flavored, meaty filling. Haw Mork Fish is an incredibly light, deeply flavorful steamed mix of red curry and fresh tilapia, and the Fish Cakes although apathetically named offer a superbly seared outside with a soft, creamy, subtly sweet fishy center. Corn Fritters are wonderfully crispy but cloyingly sweet. Tofu Crisp lacks flavor even when doused in sweet chili sauce. The main entrees are unfortunately not as adventurous as the tapas menu, but the Thai staples are all solid. Curries carry robust flavors though err on the rich, sweet side. Noodles and fried rices exhibit proper cooking and are complexly flavored. Proteins are of high quality and amply portioned. Everything is reasonably priced to boot.
In short, Silk Elephant does quite well for a special occasion or for the semi-adventurous eater who wants to sample a wide range of flavors.