It's an okay place for a short stay. This place is cozy but bit of small, only window is on the roof and it's not easy to open it.
Internet speed is good, but my work laptop fails to login work VPN due to Internet security reason (not sure why, it works in other places).
If you are a light sleeper, ear plugs would be a good choice since you can hear neighbors' TV at night.
This building is elegant, location is great, easy walk to lots of places, and apartment is well-equipped, bed is very comfortable, overall It's totally an ok place for several days stay in Prague