We had a great time in P-Berg! Alan was a very friendly host- he gave us a great run down of the city. We had a limited amount of time in Berlin so it was great to be told what to avoid, how to do the touristy stuff all at once and get right into the fun parts of the city.
The location is cozy, and near all the things you'll need - transit, grocery/alcohol, bars.
Let's face it, no one goes to Berlin to hang out wherever they're staying. As a home base you can also use to cut down on breakfast costs and to do a bit of pre-drinking you can't go wrong.