I went to Windy City Beefs N Pizza in December 2014 for dinner with a friend on our way back to Los Angeles. We took two deep dish pizzas, and the food was pretty good, but unfortunately not as good as a real Chicago deep dish pizza which is what I was hoping to get here.
The restaurant was almost empty when we arrived (It was about 12pm) so there was absolutely no wait to be seated. The service was decently fast and nice. The restaurant is in a strip mall and has a very large parking lot where it is very easy to find a spot. The atmosphere inside the restaurant was pretty nice and very "Chicago" with a lot of baseball and city references.
The price is also quite reasonable for what you get.
Overall, my experience with Windy City Beefs N Pizza was quite positive and I would recommend it if you're looking for a pretty cheap pizza on your way back to Los Angeles from the strip. Feel free to message me for any additional details that you may need!