Maide is a great host. Although we did not meet face to face, the whole check in/out process went smoothly. The communication was excellent and Maide went out of her way to make everything just right (we had an early inbound flight and a late outbound).
The apartment itself is perfectly placed, right next to the Galata Tower, close to the Sishane Metro station.
The room was really clean and bright, the bed was comfy and there was pretty much all you could have needed in terms of utensils and amenities.
The neighbourhood itself is awesome, there are tons of great places to dine or just have coffee, one of them being right downstairs from the apartment (fresh pastries and awesome coffee). Keep in mind that the whole area is on a steep hill side and plan accordingly (the apartment is downhill from Sishane and uphill from Karakoy)
I highly recommend Maide and her apartment for a couple wanting to visit Istanbul.