We stayed at Kongress Hotel Davos in August 2011 for a week. The hotel is located half way between Davos Dorf and Davos Platz, but since there is a bus stop right next to the hotel, it is easy to travel around the Davos area. Our room was on the 5th floor facing the Congress Center so the room was very quiet. There are however rooms that face the main road, so those rooms are probably not as quiet. There is also a construction site going on on the other side of the main road and they start working at 7 am so that noice might also be heard at some rooms.
The room itself was spacious and had 2 armchairs, so there was a place where to sit besides the beds. The balcony was small with plastic chairs and a table. Not very comfortable, but on the other hand there is so much to do at Davos, so you will not have time to sit on your balcony. The most unpractical thing about the room was that it had a wall-to-wall carpet so there is no place where to put your muddy shoes when you return from a mountain hike. Also the shower was very narrow since there was no shower curtain in the bath and when taking a shower you had to turn this plastic wall to protect water from splashing all over the bathroom. A normal shower curtain would have been a much better solution. The safe in the room was free and worked with a code.
We had halfboard and ate dinner at the hotel every night. The food was very good and it was a good solution, since it EUR CHF rate is so poor (1:1) at the moment, that eating out would have costed a fortune. A large beer at the hotel restaurant was 8 CHF, 0,5 litres of sparkling water 5,60 CHF, 2 dl of house wine 8 CHF and a drink (tequila sunrise) 15 CHF. However this price level seemed to be the same all over, so the hotel did not overprice their drinks. The breakfast at the hotel did not have as much choise as some big hotels do, but everyting was fresh and there was always plenty to eat.
Davos itself was a lovely place with excellent hiking paths in the surroinding mountains. There are suitable trails for everyone and you do not need to be an experienced hiker. And the views are just breathtaking...
