The apartment is greatly located less than 200m (but seemed like much less) from Charles Bridge on one of the most touristic streets. But because of that, it might be quite nosy, we were woke up twice during the night. The apartment is very big (at least for us) and we couldn't enjoy it fully because we stayed just for one night. In some places the parquet is squeaky but it increases the feel of old Prague. The bed and the sofa were prepared for sleeping for us.
I definitely recommend it.