I frequent this place every other week or so with a friend and we always enjoy the food and service. Food is consistent, fairly priced - for Bellevue, and delicious. Portion size is adequate. Food has always come out quickly, which is great when you're hungry!
Service is also top notch. Typically the same waitresses and they do a great job at greeting, seating, and taking orders. They also come back to see how you're doing and even some small talk before the meal.
Overall, I highly recommend this restaurant if you're in the Bellevue area. Of course there's other great Thai food restaurants, but Chantanee's consistency makes it a quick choice to go back.