Petra's apartment is really lovely. We stayed there for 3 nights at the start of April, and we couldn't have hoped for better.
Her husband welcomed us after we got to the place and explained everything very clearly. The flat has a lot of guides and phrasebooks which was very helpful.
It's a nice private place in a quiet block.
It is as described and in a great location for walking around Prague.

Overall we were very pleased with our stay.