When Nahm opened it was controversial as it serves highly contemporary food in the view of many people. The michelin starred chef and operator david Thompson introduced a series of well research original dishes that most people had never heard of.
And having a foreigner produce fantastic novel thai was seen by many Thais as very strange. Almost an affront to the national food gurus / Well just try and you Will understand that THIS is truely worlclass.
I suggest the set menu which gives you the opportunity to taste a good variation.
Nahm ( which means water in thai ) is located in the contemporary Metropolitan hotel
Enjoy

We ate here with a group of friends who love their food, one of whom is a wine maker from NZ. We had a semi private room which was well furnished and comfortable. We had the set menu for B2,500 and he chose the wines. Great not to think! the food was sublime and the wines great and great value. If you are not shy of spending a dollar this is a must do on a Bangkok trip. I had tried to get in a number of times in the past and am very happy we made it this time.

Had a fantastic dinner here, whilst staying at the hotel. The service was fantastic, with the wait staff very helpful. One of us didn't want seafood, so they were most accomodating with the menu. Probably the best Penang curry I have ever eaten.

We went there for dinner during holiday because the restaurant was among the best restaurants in Asia. Good location and service. We took two set menus with 6 dishes each but we were really disappointed; the chili and hot spices made it impossible to distinguish the different tastes. One of the desserts(waffle) was really good.
With an acceptable equilibrium of tastes it can potentially have 5 points.

Unfortunately we discovered this on last day in Bangkok . SO we did leave Bangkok with a Bang!! Had the set menu and every dish was taste sensation. Reasonably priced for the quality , but what is price when you have a food experience such as this.