We went as a small group for my 40th birthday and visited most sights and ate in great restaurants. The Kampa Park was recommended to us by friends who had visited Prague earlier this year, we found it extremely expensive (£330 for 4 people) but we did enjoy 3 courses and the cheapest bottle of bubbly.
There are many cheaper places to eat and we especially loved a small cafe for champagne birthday breakfast over the King Charles Bridge.
The apartment is in a great location for all of Prague, its quieter at night than staying near the main square where the late night parties are going on until the early hours.
The flat is warm, clean and has everything you might need for a short or longer stay. The 3 flights of stairs would not suit all ages but worth getting into the apartment, opening the windows wide and sitting back to listen to the sounds of Prague.
I would suggest a visitors book perhaps so that everyone could share their visit and suggest sights, also I would have expected a bottle of water at least if arriving late at night although many bars open until late if you prefer to go straight out into the town.
Adam who greeted us upon arrival was excellent and the email communication prior to arrival was fantastic.
I would recommend Prague, this company and apartment to anyone. We mentioned a couple of minor maintenance issues which I am sure will be rectified soon but these did not spoil our stay.