The stay at Martina's place was excellent. Martina is a very nice woman who made sure that I as a guest had everything I needed. For example, I had forgotten my power socket adapter, Martina saved me with hers. She gave me tips about activities in the neighborhood, not only by indication like 'this and that' but by looking all the activities up and sending me the info to my phone.
The neighborhood is very close to the lake, 4min walk. The tram/bus stop is just next door, the tram will take you to the center in about 20min.
The apartment is very nice, there's enough space, good wifi for the internet, very nice kitchen with everything you need. The place was very clean also.
Finally, Martina is a very nice person to talk to, she did everything in her power to make my stay very pleasant.