We stayed for 3 nights in Matej's flat. Everything was good and as described.
There is a Lidl right next to the flat where you can get everything you need. It takes about half an hour to walk to the centre, but there are good public transport connections. The underground car park is a bit cramped, yet the parking space was enough even for our VW bus. Whenever we had a question Matej answered quickly.
All in all, it was very uncomplicated.
We had a pleasant journey and enjoyed our trip to Prague.
Thanks again!