I was in the Summerlin neighborhood, and had this spot bookmarked, so thought I would give it a try!  I've read earlier reviews, and it looks like they have established themselves nicely now.  The interior is very upscale, which wine glasses and fancy wood furniture.  The dining area is small, but nicely designed.  Wine bottles are fancily displayed in wooden shelves behind the bar.  There is even a small outside dining area, which might be nice on a summer night.  The easy listening music would have touched my inner yuppie, if I had one.\n\nI had no issues with the service.  I made a bit of small talk with one of the waitresses, and she explained that Nittaya's has only been open for two months.  My water was always full, and they asked me how my food was.  This also was the first Thai restaurant I've been to where the waitress folded my napkin over my lap.  I wasn't even with anyone!  Can't complain there. \n\nMy order: Thai tea, Crab Wontons, and Curry catfish.  \nOverall impression: descent, Americanized Thai.\n\nThai tea was average, very creamy, but not very flavorful.  I would go ahead and skip the Thai tea at Nittaya's.  The water though had fruit in it!  This is how my old stoming grounds, Thai Grill, does their water, and it makes for a very refreshing, slightly tangy drink.  \n\nThe Crab Wontons were a little bland on the inside.  They used some sort of either immitation crab, or low quality crab, mixed with cream cheese and a couple of herbs.  The fried shells were nice though, thick and well prepared.   They came with two sauces, a sweet sauce and a spicy one.  Both were good sauces, particularly the spicy one, and they made the crab wontons definitely more doable.  Overall though, I wasn't too impressed.  \n\nThe curry catfish was alright.. not great, not bad though.  The curry sauce was thick, and on the sweet side, but in this case that was ok because catfish is always a little better with sweetness to offset the \"dry\" catfish taste.  The portion was a little small for the $13 price tag.  The curry came with a nice change of pace though: baby bok choy.  This did give the curry a little bit of a unique taste, I and enjoyed it.  \n\nOverall, due to the sweetness of the curry, and the not-so-thrilling crab wontons, I wouldn't go out of my way to eat at Nittaya's again over some of the better, more authentic Thai restaurants in Vegas (see my List), but it would be a good spot to bring a date or the parents maybe.