Lovely little apartment, right plonk in the middle of the most happening place in town. Evrin welcomed us personally. We arrived just after 12 noon, which was before check in time, but half of the apartment was ready for us, and the other half was ready soon too. The apartment is heritage - very old, and carefully preserved. It is tiny though - so I would recommend a maximum of 6 adults and maybe 2 kids, though the 4th room is really small and tends to get stuffy, so a total of 6 is best. Theoretically it can fit 10 though. Everything was as described in the posting.
The best part is the location. In Beyogulu, just next to Galata tower. There are cafes and shops right at the door and they open till late at night. The Galata tower area is buzzing with life with people chatting, playing music, generally chilling. It's an artsy part of town, and there's graffiti everywhere. Sultanahmet is an easy taxi ride away (15-20 TL), or you can take the tram or metro which are not far too. Be prepared to walk up and down the hill frequently!