We had a great stay here in Galata. Zeynep and Ugur were very on-hand to respond to questions and the apartment was extremely clean and comfortable. We enjoyed the little touches - tea and coffee provided, robes available, nice soap, etc. There were recommendations for restaurants too; there are some great ones within walking distance and plenty of places nearby that serve lovely breakfasts.
The location is great for exploring the area, and easy to get to the main sights in Sultanahmet both by tram and walking over the bridge.
It is worth noting that the Galata area is very hilly - not a problem for us but worth considering if you have limited mobility. Also, over the weekend especially it can be noisy at night, but this is probably true of most areas so just bring earplugs and you'll be fine!
Thanks Zeynep!