The apartment is clean and cozy, equipped with basic essentials and a comfy bed. The location was nice too: walking distance to stations(bus and metro), 5 mins walk to the river, walking distance to the center. Supermarkets and nice restaurant right at the corner.
The only flaw during our stay was the water system. First we found that there wasn't sufficient hot water for showers. The next day we found there was no water at all(but then Zuzana told us it was due to an emergency break down of the pipe,understandable).
These problems were the only things that made our stay a bit inconvenient. But during these days Mark and his colleague have been following up and looking for solutions. Their positive attitude can be a plus point that make up the flaw.
All in all thanks for everything. For those of you who wants to have a comfy easy stay in Prague I would recommend. I'm pretty sure the problem of the water system doesn't come up everyday;)