Karel was an attentive host and his apartment is perfectly suited for short-term stays of two persons. The major bonuses are excellent proximity to the Prague Metro transit, good-quality firm mattress on the queen-sized bed, quiet, smooth key hand-over, good-size apartment in a posh area of Prague.
For longer-term stay, you may want to consider the desperate parking situation nearby. Absolutely stay away from the blue line, which is reserved for registered residents. All other parking is paid at a hefty rate of cca CAD 25 per day, excluding weekends - and that, if you can find a spot. If you want to avoid paying parking fines or worse, the risk of being towed away, you may just as well include the rate into your accommodation costs.
Also, some amenities, which you may like to have for longer-term stay are missing - such as a toaster or a coffee machine or television. For more extensive ccoking, the location of the stove is blocked by a microwave cart and makes cooking cumbersome.
The Internet connection was interrupted occasionally for hours at a time and when working, was at times slow beyond useful. Not much of a problem for short term, as there are multiple publicly accessible hotspots in nearby restaurants etc.
Very good proximity and transit to the Airport, which is handy when you arrive by plane.
Overall, we had a nice stay in Karel's apartment. Thank you, Karel!