I love all of the Gordon Ramsay shows... I am a big fan. However the burger restaurant does not deserve five stars at all.
It is definitely four stars... They don't have a lot of choices on the menu for different types of burgers. And the burger itself is good... But underwhelming for the price you pay. If I'm going to pay $15 for a hamburger... It better well be a really good burger.
The reason I gave it four stars and not three stars... Is that the anti-fries and the homemade ketchup along with the mayonnaise truffle sauce is absolutely wonderful. However $12 for french fries is also ridiculous.
The service is very slow because the restaurant gets pretty busy especially at lunch and dinner times. It is best to go when they first opened and then you don't have to wait to get in... But you still have to wait for the food.
If you compare this to let's say one of my favorite burger joints... Smash burger. It really pales in comparison because of the price point. You can get a awesome smash burger... And smash fries for under $10. Annual walk away very satisfied.
I paid $30 for a burger and fries at this place... And was good... But just did not have that wow factor I was expecting.