Fredd - Your review is very good, but there is no way a person can 'walk' to the metro stop in 2 minutes. You can sprint and assuming you make the green light just right, you might be able to get to the down stairs in a couple of minutes or so. But you still have to negotiate yourself to the actual metro platform. It is a very fine hotel, but it is inconvenient to the main tourist attractions. Navagating the Prague streets is frustrating since there are so few street signs.
Cheers!