I bought a Groupon certificate for Cadillac Ranch several months ago and almost forgot about it. I came across this site while searching for the address. I was pretty upset when I saw so many negative reviews, but I already had the certificate, so we went anyway.
We got there with pretty low expectations, and were pleasantly surprised with everything. Our server's name was Chelsea, and if anything she was overly attentive, checking up on us to make sure everything was OK and to take away plates. She was kind and patient, and didn't have any issues with the Groupon.
Our appetizer arrived at the same time as our entree which is about my only complaint, but we didn't have to wait too long for them. We got the nachos with chicken and they were really good. They put the toppings on individual round tortilla chips almost like little pizzas, but the result is different, and delicious. My wife ordered chicken alfredo, and I got a beef dip sandwich, both of which were very tasty.
We did go on for lunch on Sunday afternoon, and the place wasn't too busy, so that could have been part of the reason we got such great service. But who knows, maybe they're listening to all of the negative reviews on here and making some positive changes. I would definitely go again, and hope that I get Chelsea again.