Stayed in Prague with for 5 days with a couple of friends (10 in total) and decided to stay in this apartment due to due the great location and number of beds.
None of us would recommended this apartment. It was the most filthy apartment I've ever rented through Airbnb. Not 5 minutes had passed before the bottom of our white socks were black, and the apartment had no mop or vacuum cleaner to remedy the situation.
We also decided to move a double bed into two single beds for convenience, and I don't really know how to put this in words other than what we saw was a layer of dust so thick it seemed like it had not been cleaned IN YEARS.
There are clear rules in the building (no smoking, quiet after 22 etc) but none of the other guests seemed to respect this. The police were in the building twice during our 5 day stay, and this didn't exactly bother us but its worth noting nonetheless.
I can understand that these are apartments that are mainly rented by large groups of boys/men that intend to party in Prague - just like us - but paying this price for conditions such as these was simply not worth it. I've been to Prague many times before and this is my first time leaving a negative review. If you are considering traveling to Prague with your friends and looking for a place to stay I would strongly suggest you look somewhere else.