Let's start with location location location. You can't beat the location. A small street 5 minute walk from the Charles bridge.
The apartment was well equipt and maintained.
Pay attention that there are 2 parts to the apartment (we did not realize it, and only used one)
Lenka is a great host, and communication was excellent. We got a quick response to any message we sent her.
Definitely worth it, and we will probably come back to this apartment next time we are in Prague.