This flat is gorgeous! Really sweet with lots of character, plenty of space for a couple, and everything you need to have a really comfortable stay. The location is super - really close to all main attractions, and Karin gave us a really good guide to help us explore the city which was really helpful.
The only negatives were that there is a club around 100m away from the flat, and when people arrive at the club at 10-11pm and leave at 2-4am they are really noisy - one night there was a particularly loud group directly outside the flat on the street shouting for about an hour, and it sounds like they are inside the flat!
Only other thing was that we had trouble checking out as Karin had told us she would be available all morning for check out, but then wasn't. We left the keys in postbox, but would have been nice to know in advance as we missed the train as a result.
Ideal stay, great price, gorgeous city, just make sure to take your earplugs for sleeping!