The apartment is really nice, has everything you need. Also, the location is basically perfect, centrally located but isolated from the street so you can't hear it.
Unfortunately I was there when the temperature was around -8 degrees and it was a bit cold to get real use out of the balcony. Also, the building is older so it wasn't overly warm but it was nothing that a sweater and standing on the heated floor in the bathroom for a minute couldn't fix.
Caroline provided some good tips as to where to go for groceries and for eating out. She also organized my stay quite well so that when I accidentally locked myself out, there was a clear path towards a solution.
Overall, I really enjoyed my stay at her apartment and was very happy to have her as a host.