Our stay (2 persons, 3 nights) at Lenka's apartment was absolutely wonderful.
Lenka is a very kind host, always helpful, checking whether everything is fine, and providing great suggestions on places (sights, restaurants/pubs/cafes, shops) to visit. She even left some tickets for the public transport system in the apartment (just in case...). Lenka also responds very quickly to all questions.
The location of the apartment is convenient with a tram station right in front of the house and walking distance (provided you like walking) to many sights (old town, Prague castle etc.) and beautiful parks. There is also a sufficient number of cafes, restaurants and grocery stores close to the flat. Located at the fifth floor of the apartment building, you will be happy to know that there is an elevator...
The apartment as such is rather small but cosy (as Lenka says in her description), clean and has everything you need. There is a futon in the sleeping room but I guess you would also be able to sleep on the couch in the living room. The kitchen has a sink, stove/oven, microwave, water boiler, dishes and cutleries and all sorts of additional things.
WLAN works very well, too.
I can recommend this place!