The apartment was fine. The biggest advantage is the location. Great location for tourists, everything is close. The studio is very modest, but clean. We had everything we needed for couple of days. The area is not loud or noisy, no bars or restaurants close, so we could sleep well.
Still there are some things that could be better, but I think the owner can't really influence on that. The building is very old and has a very narrow, old, stairs. For young people it is fine, but if you have any difficulties with stairs and/or you have big heavy bag/luggage it will be an extremely complicated to get to the third floor.
in general it was a good stay, I would recommend this studio for this price if it is a short stay.