We stayed at the Hostel for one night while visiting Köln to visit an concert in the Live Music…read morehall. We stayed with 5 persons in one room. The staff is very friendly and all speak English (which I found was not that common in Germany). The room was really nice and picture perfect clean, literally couldn't find a single flaw. The hostel is open 24 hours so you have time to explore Cologne as long as you want. The breakfast was great as well with a nice and calm ambiance.
This combined with the location, price, cheap parking in own garage and great public transport access nearby (and public transport guidance by the hostel staff) I couldn't recommend it more. A full five stars.
Hostel staff, hank you for the service.