Mariella's place is not far from the train station (or the bus stop for the bus from the airport), it is possible to get to by foot, even with luggage. The check-in was easy, Mariella was very prompt in replying to all inquiries and questions prior to check-in and was punctual to meet me upon my (slightly earlier) arrival, which was much appreciated.
The place is clean and comfortable, although some amenities a bit old (like TV, coffee machine). The best part though is that it is very quiet, despite being close to the university and lots of students in the area.
The area is not swanky by any means, but it felt safe and the best part - it's a 10 minute walk to the historical center. There is a supermarket very close by, a bar to get coffee and pastries in the morning (to have there or to bring home for breakfast al fresco in the back yard).