Alexandra's place is located extremely well! It's close to so much of what you'll want to do in the city, and right on the cheap public transit for anything it's not close to. The entry area is a little rough, but once you've been in Prague for a bit it won't seem out of place, and the actual apartment is nice, comfy, and secure. There's no air conditioning, but this seems to be the standard for Prague. This summer seems to be exceptionally hot, and with the window open and fan on we were fairly comfortable.
Alexandra's place is great to stay at.