I must disagree..I think some of the melty stuff is cheese..but I think the broad stripe of yellow running with the kethup is mustard.
I want a side of onion rings, a chocolate shake, a coca cola, and .... hmmm, what for dessert...oh yeah! Another burger!
LOL
In all honesty, for me to consider something a good burger, you must be able to pick it up and eat it. That thing is a hot mess, no way to hold it and take a bite without everything falling out.
In-N-Out is the best burger in creation, and they have small burgers.