I would recommend this place, Miroslav was a great host and very attentive. This apartment nice and at a great location! Really quiet considering it's so near Charles bridge. The only (small) minus was that, since there are 2 bedrooms, there are 3 beds (of which 2 on a sleeping sofa) in the livingroom/kitchen; so in the evening (if you want 5 kids to go to sleep) you have to sit in your own bedroom.
But overall, this place is totally worth the 5 floors (stairs)climb! Would certainly visit again!