We had a great stay at Roman & Tereza & Friends' flat! Keep in mind that it is kinda small--the size of a hotel room--the photos make it look a little bit longer. Nice to have kitchenette & washing machine :)
Bed was comfortable for us (we are futon sleepers) but the pillows were pretty skimpy and the blankets were pretty small for the size bed with two people.
We were super happy with the availability to public transit (not SUPER close, but very do-able, we sometimes used Muzeum and sometimes went to Namesti Miru) and the helpfulness of the hosts.
The smart tv was handy and there were lots of lights and outlets, which is sometimes a problem with flats, and available heater that we didn't need.
Would stay there again if we return to Praha!