I have been here a lot as I lived almost walking distance of it for years.
Unfortunately I haven't been back since they added some new beers, I've heard they now have an IPA which is great to hear. KO's is a true family owned bar and restaurant which is now run by his daughter. This is something that I value personally because in Scottsdale everything is corporate. KO himself is a great guy, and as I result I like spending my money there. They have poker nights which are always fun along with trivia night which is surprisingly fun.
In terms of food, this is one of those places that has a rather large menu. Normally I would criticize this but in KO's case I love it. Often times my girl and I can't figure out what we want for dinner and in those cases heading to KO's is the best option. You can get Mexican, American, Italian, or whatever you want from the menu. I've never had a bad meal here and I've ordered just about everything off the menu at this point. The honey hot wings are my favorite of any wings I've had in the valley and surprisingly the pizza here is very good too. The sandwiches are great, my girl's go to menu item is the Turkey Bacon Swiss (TBS) which I would recommend myself. The sweet potato frys here are probably the best I've had in the valley, it one of the few places that actually get them crispy.
The patio is great here, KO allows and sells cigars which I like. It almost like hanging out in someones backyard but you have all the food and beer at your fingertips.