It's an In-N-Out, and that's all there is to say. It's great taste for a pretty affordable price. Potato fries and burgers are both amazing and the self-service pink lemonade is worth a try if you are discovering it.
For the location, being slightly off the strip and given the low price, it does attract quite a lot special characters from the Las Vegas underbelly as well as Uber/Lyft and taxi drivers. Wouldn't be a place I would recommend if you want to keep the impression of Las Vegas glamour and glitz intact, but would definitely be one I would visit if you want to see a bit more of the behind-the-scenes Las Vegas.