Good. Not great.
Probably worth going for some of the more adventurous items off the secret menu because all the hype will make the simple cheeseburger seem disappointing. And they really need a bigger location 'cause I definitely don't want to come back here only to take my grub to the park in order to eat a lukewarm burger and soggy fries.
Tip: the burgers aren't that big -- go for the double.