A very good option.
The place itself is very spacious. The location is good, it's on a quiet street but just one block from multiple shops, cafes, banks, and supermarkets. It's 7 mins from a Marmaray station and 10 mins from a metro or a ferry station.
Everything is just as described. There were no problems with humidity or temperatures; there was an uncomfortable smell at first but it was mostly because nobody lived there for a while and the very next day everything was fine.
The place is not brand new, some parts of furniture and decorations require a renovation but that's not something that makes your stay uncomfortable. Photos look a little bit better than reality but it's just an attribute of a place - the same is valid for the pictures we took ourselves.
Talking about the cons - the wifi is not very fast, some secondary pieces of bathroom/kitchen equipment were broken (like a toaster or a grill), and there may be not enough cups and plates for a big company.