We stayed here for 2 nights. The apartment is well located in a very central location. It's around 15 minutes walk into the central attractions. The local area is very nice and the bars there are worth a visit. Has more of a local feel than some of the more central areas which we liked.
In regards to the apartment itself, it was exceptional. The place was absolutely spotless and looked like it was a show home, everything very new and modern but located in an original building.
Our host was very accommodating. We had an early flight and asked if we could check in early. Communication with Valentina was very good and she was really helpful allowing is to both check in early and check out late.
Overall, I'd definitely recommend this place to stay. I will personally recommend it to friends going there and may well stay there again the next time I am in Prague.