We booked this apartment due to the positive reviews, yet our experience was different. When calling Yeshim as we had trouble finding the apartment (a friend of us picked us up from the airport and dropped us at Taksim Square (50€ for the airport transfer by Yeshim is pretty expensive considering the other options), she appeared unfriendly and so was also the greeting in the apartment when we finally arrived. The apartment is a lot smaller than pictured (especially the second bedrom with the bunk bed) but what stuck out the most was that it was not as clean as advertised, especially the kitchen and kitchenware and there were stains in the bed linen and towels which was kind of disgusting. Positive thing is that there was enough hot water in bathroom and as the apartment is in a small lane, we always felt safe even though we were in the ground floor and the alarm system was not turned on (Yeshim said that it is too difficult to explain us the system and that there are many diffucilties for guests and that is apparently enough to have the "Pronet" alarm box in front of the house to frighten off housebreakers,etc.).
It was also annoying to have only one key for five people.
All in all, the apartment has a good location to explore Taksim and a good link to public transport, but the price is way too high as the apartment is not well maintained and not clean enough.