The chief's mood and the service is very unsteady I think.
1) the spicy level- sometimes level 2 is two spicy, and sometimes level 6 is not spicy at all. But you can always play safe to order a low level of spiciness and ask for a side of pepper flakes
2) the amount - sometimes they make a small portion, sometimes I feel like they put two orders into one plate, today's was super big! Which is good but I got too full. Haha
3) speed - it can be fast within 5 minutes or it can be quite a wait like 20,30minutes. Maybe you colleges or friends are finishing their meal while yours just got out of kitchen.
So it really depends! But the taste is always good! Haven't been disappointed even once, Pak kee mow is my favorite!!!