First time eating at an In N Out! Well I would say it's just slightly above average based on this experience. I went for lunch and ordered the double double combo w/ cheese fries.
I do enjoy how they give you some unique "customization" options to the burger. I ordered mine with lettuce, tomato, cheese, and grilled onions instead of raw onion. It also had their version of a thousand island dressing on it which is good on any burger. The fried were typical cheese fries, but atleast you can tell that their fries are fresh real potato.
I didn't really mess around with the secret menu, but might give it a try next time. I know some people think In N Out is the best thing out there, but I wouldnt go out of my way to get some.