We took this offer on our first trip to Prague and stayed there for 5 days total. The location of the apartment is very convenient with the hottest sights being at a walking distance. Everything - metro, tram, parks, shops, eateries for most tastes are very near-by. Despite being in the very centre of Prague the apartment was very quiet, we had the windows open for the whole night for all 5 nights and there was very little ruckus to disturb us, despite having a very busy bar near-by. The photos in the ad are very true to life to what you're getting - the apartment is roomy, very comfy and everything is in a pristine condition. A very nice extra - the bathroom has heated floors, so your feet are always warm and happy! Once you get there a small stack of printed info materials regarding pub/restaurant recommendations will be on the table together with a city map and a travel guide - you'll have a great time even if you haven't done your homework before traveling.
Overall - we found the host to be exceptionally caring, helpful and easy to reach. Checking in and out is very simple and convenient. Our highest recommendation!