For any girls - I travelled solo and felt safe here :)
Minutes away from all modes of transportation BUT closer to Taksim square than Cihangir, which, if you look it up, has a completely different vibe to Taksim so I found that a bit confusing, and tbh I paid the price bc I thought this place was located in Cihangir instead. Having said that, Cihangir is within walking distance, and to the right, as you exit the building, you will find lots of neighborhood coffee shops and some art galleries. If you turn right again and walk up the long stairs, you get into some cool neighborhoods with more coffee shops. If you turn left when you exit the building and cross Taksim square, you can even walk to Nisantasi / Sisli - it only took me 20-30min, and I've got small legs, so all in all great location.
The studio is indeed tiny, but I find the photos depict that, and it packs a punch in terms of having everything you might need in it. Plus the guys are super responsive. I had an issue with the bathroom, and they came in on a Sunday afternoon to fix it. Speaking of the bathroom, many of the reviews on here mentioned the water splashing everywhere... I didn't find this to be the case. Don't use the big shower head.. simply use the normal one, and you'll be ok. Also, another comment on here mentioned there is no space to hang clothes - there is, it's just part of the room design and not your usual bulky closet. So many more hangers compared to a hotel too!
As mentioned, if you have many bags, make sure you get dropped off by a taxi at the address because the street is super steep so not a pleasant experience when wheeling luggage. Also, prepare for some serious exercise as you go up the stairs with your luggage to the 4th floor of the building - no elevator. However, unless you have mobility issues, this is just good exercise ;)
Overall, yes I recommend the place bc of its flexible and straightforward check-in, communication and overall responsiveness, small touches (coffee, tea in the kitchen), and cool'ish design.
PS: A BIG plus for the cat guarding the building door day in and day out!!