Full of friendly people- literally. This place was packed. The 100-bed dorm room got a little loud, so bring earplugs. Also the hostel was a bit far from the city so the tram is a must. The food was fantastic and the bathrooms were always clean.
The staff are all amazing. I plan to stay there again when I pass through Istanbul later in the month. Also the complimentary breakfast is fantastic. I only wish it had hot water.