The surfgasm is really close to the center and with the tram direct in the road easy to reach. We came with the car, which is bit tricky as the roads are very steep, and you can not park just in front and its special zone parking. Also the rooms are in the 5th floor of a nice old building, with good view an the river but without elevator. The place is more a hostel, so you meet other travelers. Also good located for parties, as the cais do soudre / pink street are pretty close.
The rooms are simple but way good enough, if you don't need a lot.
First the communication was difficult (we asked several times for parking informations, and only got details very short before our stay.) But once we were about to get there, we got a perfect explanation, even nice tips for our stay. Also we noted several dammages (e.g. broken bathroomdoor) in the place and when we wrote the surfgasm team, they sendet immideatly someone and it was fixed the same day. So really awesome support!