Great location if you want to stay in Gamla Stan. It's just a few minutes walk from everything you would want to see there. The host was very understanding. The apartment was small, but stylish and it has everything you need. Bed was comfortable and everything was clean. Check-in was easy with the door code. I accidentally went to the wrong apartment (what they refer to as "second floor" here is actually "third floor" to an American!). I actually knew this, but forgot. I'm a moron, but the host was understanding of my mistake.
Just a tip to people like me who are sensitive to sound... there is a church bell that goes off a few times every hour. I slept okay most of the time with earplugs in, and it was never a major problem, but this is worth mentioning. Some people will probably find this charming though. :)
I would recommend this place for sure.