I'm happy to go for a 4 here even though there are some caveats (they are mostly preference).
This place is cool. The decorations and dining area are engaging and inventive and has that 50's diner feel. Its a neat family atmosphere an the menu has enough depth to please the non-hotdog eaters in your picky group, too.
I tried a good sampling the first time we went - the Chicago, the Bonzai, the Retro and the burger. I've only re-tried the Retro. The natural casing dog is the best they have there in my opinion.
The home-brewed rootbeer is super-tasty and the shakes were good, too.
This is a fun afternoon or evening out with the family place that we will definitely try again!