We stayed in Mirjam's place for five nights as two friends and had a really enjoyable stay. The apartment is lovely, lots of natural light, good stereo, all the amenities you could need and the very nice interior style. I slept on the sofa bed and found it comfortable.
The apartment is easy to get to from the central station, just two trains and about half an hour. It was easy to get anywhere using public transport. The immediate neighbourhood had enough going on to keep you interested, Turkish markets were fun, coffee shops, restaurants and bars all nearby.
At times I felt a little bit uneasy in the metro station as a female and I probably wouldn't walk around by myself at night, but having said that I don't like walking around by myself at night in Sydney either. I travelled with a friend and we didn't run into any trouble.
Mirjam was a lovely host, we didn't meet her, but communication was prompt and she was helpful in responding to my questions and providing transport information.
I would happily stay again.