Sinans place was great. I'll give the positives first and some small 'improvements' or things to note as I don't think there were any negatives.
Positives:
1. Sinan is incredibly responsive and at instant speed, his English is fluent so no problem communicating.
2. If you require additional things which are sensible e.g iron, ironing board, extra set of keys, Sinan will kindly provide it.
3. The place is located near the grand bazaar and other tourist places. It's in the heart of a whole seller's market and as such has great amenities such as super market, transport links etc.
Improvements/things to consider
(This is now me being extra picky)
1. The double bed mattress could have been more comfortable as it was made of sponge.
2. As the flat is located in a tourist place, this means by 8pm almost everything shuts and it's a ghost town with no services near by. As a result you have to walk for 12-13 minutes down hill to get to open restaurants/shops etc.
In summary, if you dont mind spending that much more at an above average cost for those extra comforts, then Sinan's the place for you.