Popped in here when we were doing a bit of Xmas shopping on a recent break in Berlin.
Looked at the menu outside and was just a little more expensive than other places we had eaten but thought we would give it a try.
Staff spoke English but were impatient over how long it was taking us to order, if their menu wasn't 13-25 pages maybe we would have ordered faster - as they were pretty much dead I don't know why they were so bothered.
Starter was bland and it took forever for the waiter to clear the plates and collect the mains which the kitchen had clearly been ringing the bell for for at least 5 minutes - bearing in mind virtually nobody else was there.
When the main arrived mine was smothered in mayo and had no ketchup despite when my order being taken and the waitress asking if I wanted both either or neither I clearly said ketchup only. It was served on clay cold plates that were chipped and not recently - the fries served with the burger were also clearly cheap frozen ones.
If you're in the area and anywhere else is open give this one a miss.