I stayed at no.16 Al Hamra ap from the 28th-31st 2012 with a group of 8 friends. We each had our own bed, rather than a sofa bed, which were very comfortable and large, brilliant to come home to after a night partying!
The kitchen is basic and has everything you need, inc a large fridge and coffee machine.The bathroom is lovely and big, with a bath and shower.The apartment has a balcony which was handy to get fresh air. As it is a residential area we were asked to be quiet coming and going late at night/ early in the morning, which was obviously not a problem.
Lovely location, you are able walk to Mitte if you enjoy walking, if not just a cheap taxi/ tramp ride there.
Lots a nice places to eat in the area, including Frida Kahlo, a Mexican restaurant, highly recommend, staff are very helpful and lovely: http://www.qype.co.uk/place/4073-Restaurant-Frida-Kahlo-Berlin
Had to wait for the chap to meet us with the keys for about an hour, but we were early. Not rated too high for service on here, as its self catering.
Had a fab time, beautiful place to rest your head and chill out when your not exploring the city, I would stay here again.