We stayed in the Arthur Suite for 4 nights.
Location:
It's an old building almost next to the Charle's bridge in Mala Strana (lesser town) neighborhood. Some prominent places like the old town square, astronomical clock, the castle, Strahov Monastery and Library, John Lennon Wall, Kafka Museum and the narrowest street are walkable. For the other prominent sites, the Malostranska metro and Tram station are again reachable by foot. Some great restaurants, chimney cake shops are nearby as well.
The apartment:
In one word- it is magical. It's a charming old attic apartment with a small yet fully functional kitchen and a modern bathroom. The bed was too soft for me and caused back ache, but that's only me. My husband slept on it very peacefully. There's also a comfy sofa bed (which I ended up using at night as my bed). Our first day in Prague was very hot, the AC made it very comfortable. The stairs to reach the apartment are wooden, old and steep. It took us a few ups and downs to get adjusted with them.
The apartment is also equipped with fast wifi. Bonus: The apartment offers an amazing view of the Castle.
Check in and out- The moment I booked the apartment on airbnb, the hosts were regularly in touch and helped us with all the information we might need before reaching Prague. They even arranged an early check in for us which I really appreciate! Check out was even smoother.
Overall I wholeheartedly recommend this apartment and I'll definitely rebook it for my next time in Prague.