This is a great space that has sleeping arrangements for up to five guests (two double beds and a single bunk up high). It's compact, which is a good thing for a short term/vacation space in my view, and moving in the kitchen might be a little challenging with that many people at once, but there are two toilets, and for the three of us it was perfect! There are cooking facilities (stove top, and oven) along with a kettle and coffee maker. Lots of hot water, nice towels, and a great shower round it out as a very comfortable place to stay. There's a gym next door, and at first we were a little worried in case they would be doing the loud music aerobic thing in the pre-work hours, but this didn't happen. There was no music, the workouts started perhaps at 7am, and you could only make out the slightest noise; much less than any normal neighbors in fact.
The location is great, being 500 meters from Josephplatz U-Bahn station. We got the city cards ticket from the Hauptbahnhof office, with gave us access to the entire public transport system, U and S Bahn, busses and trams. Five days for three adults cost under $60 Euros and I don't think we had to wait more than three minutes for a ride to show up more than three times in the entire time. German public transport is fantastic, it's no wonder my brother--who lives there--dumped his car!) There are also supermarkets, bakeries, restaurants and more in this immediate area, though most tourists will probably want to eat in the more tourist oriented locations.
No hesitation in recommending this place, and I'm hoping I might have a chance to go back.