Karen is really available, instructions are clear and the location is perfect (easy to take the bus but it isn't even necessary if you like to walk).
We were a bit disappointed by the apartment though. We knew from the pictures and the price that it would be basic, but given the praising comments we had read, we were expecting a bit more. The apartment is indeed basic, you get everything you need, it is clean but it is really humid. The furniture seem old and some pieces need to be replaced rather than fixed with adhesive tape. A modern TV with integrated speakers would be nice, and a portable bluetooth speaker would be more useful than an old radio/CD player. I have no issue with Ikea-furnished rental but I think the apartment could be far more cosier with a little bit of effort.
We did enjoy our stay, but I would recommand the apartment for crashing at night only and not if you intend to stay longer.