Stopped at Tepthida while craving some good Cambodian food in Lowell over the weekend. The food was quite authentic and tasty, especially the dishes with prahoc in them (you have to like the fermented fish taste!). The loclac was less good than some of the other dishes. But the place is very sleek and well-decorated, and when we were there a huge, dressed-up Khmer clan came in and took over the whole restaurant to celebrate something or other, which was fun. I also liked the Khmer karaoke on the TV. I definitely recommend it if you're looking for an upscale Cambodian place.