We stayed in the Avantgard apartment and while the location was great; right in the centre of the old town, within walking distance to many cafes, restaurants and shops, the apartment did have a few issues.
It faces the main road so it was quite noisy throughout the night. The apartment itself is also very creaky, especially the loft where the bed is. The kitchen has a stove and microwave, but not much in the way of pots/pans or crockery so it's not great for cooking your own meals.
The bathroom had a mildew smell and the shower had a few broken components but was functional.
It's also quite dark in the dining/bedroom areas.