We just stayed at Hikmet's place for 5 nights and thoroughly enjoyed it. The location is great - you can walk to the main attractions (Blue Mosque, Aya Sofia, etc.) in 10 minutes or less. It is also close to a main 'tourist street' where there are plenty of restaurants for quite cheap - even if they are tourist prices. There is a corner store just down the hill and to the right that sells beer and snacks. Not all stores sell beer if you are looking for some!
The apartment looks exactly as it does in the pictures. It is very clean with an excellent shower. The bed is a little hard but that isn't a huge deal for us. As other writers said, there is a bit of noise from the streets but with the AC on we didn't hear enough to be that big of a nuisance. We were also treated to a traditional turkish breakfast courtesy of Hikmet which was excellent.
Thank you, Hikmet, for your wonderful hospitality.
I would highly recommend Hikmet's place!