Kristina's place was a lovely apartment located on the 2nd floor. It is in rather old building so you should be aware that i.e. bathroom and kitchen are rather small and all the stuff is not so fresh as in new apartments. Location is actually great, with the tram stops in front of the building and metro station few minutes by walk. On the other hand, you will not hear much noises because the windows do not face the street. The shops around are rather expensive, so I suggest a few minutes walk to i.e. Tesco Express. It is also less than half hour by walk to Charles Bridge.
What became a real struggle was a contact with a host which always took few hour to get a response. In a situation when the electricity in the flat went down and all fuses where ok was a real pain. Hope Kristina will solve all the problems soon.