Beautiful place. One of the main place to visit being in Prague. A lot of tourists though doesn't let appreciate easily. Bad luck that renovation of astronomical clock is taking so much time.
The square is beautiful, definitely go here if you're visiting Prague. Watch out for pickpockets in a sea of tourists and you will be okay. The smell of roast meats permeates the square as you walk around, it's tempting to get a bite to eat but if you walk another two blocks you will find much cheaper food.