Had the catfish which was flavorful but may be a little pungent for the American palette. Since I'm a ninja, I'm used to bold flavors.
What makes the Northeastern/Laotian style different from other Thai cuisine is their use of dill and lesser use of coconut. The dill imparts a special herbaceousness that is unique. I found it to be fairly representative of the region since I've been there many times on my assassination missions. Watch out for the authentic Laotian spiciness scale. It will make you cry like many of my victims. Their sour sausage dish was very good too. It's ground up and stir fried with chilies, lime and the usual gamut of thai spices.