Great location near to Istiklal Street which is Istanbul's equivalent to the Ramblas. Lots of restaurants etc. nearby around Istiklal St, bars, coffee bars, music, vintage/antiques and clothes shops, galleries in the sidestreets. Easy to get the Tunel to the waterfront opposite the old city, and a short walk to Topkapi. Mosques etc.
A large bright room set up as a studio apartment even including a washing machine. The owner has thoughtfully decorated the room with antique pictures etc. and all the amenities we expected. It was very well located away from the noisiest streets, but conveniently near to a small bakery (3mins!), so we could fetch fresh pastries or eat in for breakfast. Just as close is a small store which is open 24hrs for milk etc.
Our host was very welcoming and quick to respond to any questions.