Stayed at Cem's place for a few days with a friend and it felt perfect for us. His friend met us at the entrance of the building and gave us the keys, and then went up with us to show us around the apartment and explain everything. We didn't need to use the kitchen or washing machine as we were only there for the long weekend, but it all looked in great condition with anything you might need for a longer stay.
The location is good, with many places to eat around. The host gave us lots of recommendations for places to visit, including a food market just a few blocks away from all over the world. The tube station is just a block away, too, so you can be in Central London in no time. Borough Market and London Bridge are within walking distance, too. It can be a bit noisy since the train tracks are really close and there's a lot of movement in this area, but it didn't really bother us. You might want to bring some earplugs with you if you think that might keep you awake--we were so tired after walking around all day, we fell asleep as soon as we got in bed.
Last but not least: the view from the 14th floor was one of the highlights of this place, especially at night!