The bed as really noisy (each time we moved, even slightly, it squeaked and this was annoying - I informed them about this, hopefully they fixed it). No elevator, but this was not a big issue, the hotel only has two floors. No reception after 6 p.m. but there was no real need for that.
Great location, close to everything. Free private underground parking. Very helpful staff, although not all of them spoke English. Very good breakfast (nothing special, however it was complete). We were given a ticket that provided free entrance to the waterfalls (regular price was 6,50 euro per person) and reduced prices for other services (entrance to Black Forest museum, bus tickets etc).