Super clean and practical apartement between Namesti Miru and Museum subway station, in other words perfectly located for people familiar with Prague's layout and new comers alike.
Only downside, and I'm surprised it wasn't mentioned in other reviews, you can slightly hear the subway or tram when it goes by, every few minutes or so. Not a big deal if you're a heavy sleeper (I'm a light sleeper and was fine with ear plugs). So overall it's calm, but not all perfectly quiet :)