If you're looking for solid, reasonably-price Thai in a convenient downtown Toronto location, Spice Thai Cafe is your place.
I dined on a weekday with a party of 9, and when we arrived we were the only diners. Luckily this emptiness was not a foreshadowing of what was to come. Our orders were taken quickly, and our food arrived shortly thereafter, with every order exactly right. I had the vegetarian lemongrass soup (perfect for a chilly Toronto evening) and the green mango salad without chicken (great flavors, but a little on the sweet side). We ordered mango and sticky rice for dessert, and this was by far the most beautiful and delicious thing we tried. The prices are reasonable, and the decor is almost jungly, with potted trees scattered throughout the dining area.
Is it the best Thai food ever? No, but it's still pretty yum.