If you enjoy more franchise based diner like eateries you probably really enjoy Eat N Park or Dennys. This is more than fine, in fact this is the only downtown equivalent to such a place. Unfortunately Nicky's is a little pricier than you typical diner. More importantly in the few times I have been, the service has been slower than a drop of molasses falling down a Vermont Birchwood in the middle of winter. (I have no idea what that means)
All in all if you find yourself downtown in a withdrawal like state for basic diner food and you fear you may die unless given your typical diner dose then I guess Nicky's is right up your alley.