Was craving a burger in Harvard Square so decided to try Flat Patties. I should have known that a medium rare burger could not have been prepared so quickly. Unfortunately, I got mine "to go" so when I discovered it was raw, there wasn't much to be done. The cheddar cheese was very ordinary and not particularly good. So boring cheese, lettuce, and tomato on top of a raw burger. The whole thing was soggy and unappealing. There are much better burgers to be had in Cambridge.