Frank was very friendly, I arrived a little early than expected and he was incredibly nice about it. Made me a cup of coffee and let me relax while he finished preparing my room. The location was amazing. Right in the middle of great bars and restaurants, a block from the Ubahn, and within a mile or so walking distance from a lot of attractions. It was a little noisy at night, which I expected from the location, but a set of ear plugs solved that with no problem. I will absolutely be back the next time I visit Berlin