My husband and I eat ZK quite often - in fact, we just ordered from here last night and it reminded me to leave a review that is long overdue. I wish I could give a rundown of all their entrees and appetizers, but sadly, we both only order the same two items EVERY time (I know, how boring) but we just love how good it tastes! Chicken kabob and lamb combination plate with a mix of rice and salad (and two orders of baklava with a yogurt drink) and MMMMMM we are in heaven! That order comes out to $40, so it's not really cheap but the quality is fantastic AND they serve you A LOT of food (6 pieces of each meat, a big bowl of salad and most likely 2 cups of rice.)
The only thing that irritates us is how they charge for the tzatziki sauce... 75 cents for a small serving. You have to pay for this because they don't serve any sauce with the entree, so it's a minor annoyance but we just suck it up because the food is great.
Also, if you're ordering in, your food is finished very quickly - 15 minutes tops. It doesn't seem like that big of a deal, but when you're hungry and you're rushing home to watch your new favorite show... you seriously appreciate it.