Actually, thanks for the bump. Ironically, I just ate this today.
No mayo, but add mustard and ketchup. And...
It's not so big. I'm not much of a burger conoisseur (

), because I'll pick up a Quarter-Pounder with Cheese from McDonalds, or a Double Cheeseburger from Burger King, and that's about it. I was intimidated by this at first, as it truly WEIGHED a lot and looked huge looking at the outside box. Then...I bit it. I realized, I hate bacon on a hamburger. It tastes weird.
So I take off the four peices of bacon, give them to a friend, and continue. But the burger still has that kinda-bacon-y taste even after it's gone, and I get sick of it quick. Eat half, give the other half to my friend.
Next time, I'll ask for no bacon. Might not be a Monster Thickburger anymore, but it's still pretty huge.