We stayed here in July of 2006, and the weather in the city was very hot at that time. Our room faced the A-100 autobahn, and the noise was tremedous if we had the windows open. It was too hot to sleep in the room with the windows closed, but too loud if we kept them open, so it made for a very long uncomfortable night.
Breakfast was quite adequate, staff was friendly and helpful, and our room cost was about 70 euro per night.
Not a bad place to stay, a bit out of the way perhaps, but a much better option in a cooler time of year than in mid-summer.