This is a beautiful, and large space about 20-30 minutes walk from all the main sights in Prague. The pictures make it look fancy, and I suppose it is.
In the end though, my wife and I were disappointed with our stay I suppose, in that we were looking for an "apartment," and this was more like a "hotel." Some details we had experienced in other places were not here- such as a way to play music from our own devices.
Friends of ours, a couple, were unable to join us last minute, so it was just the two of us in a massive space. It was so poorly furnished in the kitchen upon arrival (it would have been impossible to ever cook for even the four of us!) we asked for some more things, and the owner bought some things the next morning. This made it possible for us to cook in the end. We are grateful for that, though if you are a large group, do not expect to be able to do any amount of cooking beyond basic things. (Full disclaimer, I am a chef, so I have different expectations, but I am also aware of practical realities)
Finally, not mentioned is the fact that the building is on a corner, with a streetcar on one side, and elevated train tracks on another. They are loud if you are a light sleeper like myself, and we used the back room with fans on to mitigate the noise.
In the end, if I could give 3.5 stars, I would. It boils down to the "apartment" versus "hotel" experience. I like staying in both, but my expectations are different for each, and this apartment left me feeling like I overpaid for a incomplete experience.