I stayed at Cenk’s place for a month and really enjoyed it. It’s spacious and comfortable, just like in the pictures. What I liked the most was the abundance of light due to all the windows. The bedroom is quiet, which I understand is not common for the city, especially so close to Taksim, so I slept well at all times (comfy mattress too - not too soft/firm).
Sometimes there was a smell from the bathroom sink (especially after a rainy day), but reportedly that happens all over Istanbul even in new buildings, so it was not a big deal.
Everything worked in the apartment, so I would definitely recommend it both for short-termers and those staying longer like me.