My girlfriend and I had a wonderful stay at Edgar's apartment. It is exactly as pictured. It was very clean and had all the amenities we needed (air conditioning and washer/dryer were on the top of that list). The front desk staff were helpful and friendly. The apartment is very safe.
The location was fantastic. It is walking distance from basically everything you would want to do in Prague. It is very close to several bars and restaurants.
Edgar himself was the perfect host. He greeted us with his trademark beer and fruit welcome package. He spent almost an hour with us suggesting places for us to go. He even took the time to mark them on a map for us.
I would highly recommend staying in Edgar's apartment and I will definitely stay here when I come back.