We had a lovely time in the little oasis that is Smithy's place. We felt secure, even with some of the trade being offered on the street outside. Having two levels was great and two bathrooms although the shower in the main downstairs bathroom wasn't really functional. Having a bath there was great though.
The kitchen is a little small and so for a family of five, we didn't really cook there. Lovely big table to sit around though.
Having our own private courtyard was great although it rained throughout our visit so we didn't get much use from it.
Ww would recommend this place to families though as you are fairly secluded while still being within a stones-throw of the centre of the city. The No. 85 or No. 48 Bus was all we needed and three stops later we were there. Great place in Berlin.