We have stayed at Ivana's flat for a month.
It is a great place to stay at - it has everything you might need.
The location is also perfect - you are away from the loud city centre, but there is a tram stop and a metro station 1 minute away, which will get you to all the sights in 15 minutes. You can also get to a big shopping centre by tram in about 5 minutes.
All in all - I highly recommend staying at Ivana's flat if you're in Prague.