This apartment is brilliant - really clean, big, stylish and comfortable. In fact the bed was so comfy, we had trouble getting up in the morning! The location is great.. A fairly quiet area with a couple of bars and restaurants nearby and only a 15 minute walk in to the central Clock Tower square. There's a supermarket within a 5 minute walk and tram stops really nearby too.
One issue was that the apartment is quite warm, but there are lots of windows to open and a fan in the cupboard (though we only found this on the last day). Also having the windows open at night means you do get some noise floating up from the street but all in all it's not a huge problem.
Highly recommended if you want a nice break in Prague!