Jan's apartment was clean, modernly furnished and comfortable, complete with quirky touches including an antique typewriter. Great place for the craft beer lover as the fridge came complete with beers and is in close proximity to a brewery and bar - despite which we did not notice much noise at night. The centre of Prague's old town is not too far - about a 20 minute walk. Overall great place and we had a great weekend!
The only small drawback to mention was that the kitchen was reasonably minimal. However as eating out in Prague is not expensive this was not a problem for us!