The kitchen looks like something you would find at a BBQ picnic thing, not a diner.
I just noticed the abnormal size of that hamburger.
It's a little too big, and it ends up looking like it's clutter in certain areas. I also feel that the cooking area could have had more in it.
It's also a bit bland, But that might just be the lighting, also the seats look a bit off and that space between them really bugs me