Book this flat !
It always takes me a while to find 'the perfect flat' on Airbnb, but this time I just went ahead and booked Roman's flat as it looked amazing on photos. It was indeed a good choice. The flat is beautiful with interesting objects, books and furniture. It is conveniently located and Roman is flexible about check in times. We found it easier to take baths rather than showers as the shower room ceiling is very low. However, since it was all very clean it didn't really matter.
We also came across Roman's bookshop by chance, which is lovely and definitely worth a visit if you are interested in books in English and French. It's near Charles bridge - a very relaxing space where you can just take a sit and browse through a great selection of new and used books.
Thanks Roman for being partly responsible for making our very brief visit to Prague an amazing one.