For this year’s carnival, we decided to stay at an apartment not far from all the events instead of bothering family or friends in Berlin again. :) It was perfect for the 4 of us, enough space, central location and close to the u-bahn stop Boddingstr. The apartment had everything we needed: towels, hair dryer, coffee, tea etc. ... and with the code it was easy for us to get in and out.
Communication with Volker was good; he explained everything in advance. Highly recommended - we would choose it again for a stay like that 3 nights.