I only had a short interaction with Sylvie who met us and gave us a quick greeting and then left again, but she seemed nice and was easy to contact.
Sylvies flat is a perfect for 3-4 students or couples traveling on a tight budget, who just need a place to sleep. But don't expect anything fancy. The shower was broken and the trash was not emptied which doesn't give a great impression, but the overall stay was fine.
The location is good, near the bridge in the nice part of town. You can walk down to the center in around 20-30 minutes or take a bus from one of the bus stops near by.