We had a nice stay at Oytun's place. It's a great location to get around using the metro or by foot, and very close to Taksim (great spot to hang out at night).
However, we found a few areas for improvement (see below). Definitly stay there if the fares are low (we paid 25€/night for 2, which is rather cheap, but it's probably not worth more) and if you're not planning to spend much time at the hotel.
Some small issues we encountered:
- Bad smells from the bathroom at times
- You could hear your neighbour coughing, the walls are far from soundproof
- Breakfast was really not "magnificent Turkish Breakfast", rather a few bowls of cold nuggets, potatoes, mushrooms, olives... put in the fridge and served again the next day. But it's edible and you spare the cost of a breakfast in town ;)
- Neighborhood is indeed very close to Taksim, but we found the streets around the hotel rather shady. I wouldn't want to wander there alone at night !
- Staff does not speak very good English, which makes it hard to ask for information
- Some guidance about what to do, what to see in Istanbul (e.g. more quality and updated maps and flyers) would have been valuable