We stayed for 5 nights in this hostel, and we liked it! The place is very unique. Our room was in Egypt style with camels and pyramids on the wall. Also the showers are nice to see (and use). The people are very kind. It is a little walk to the centrum of prague, we walked almost everything during our stay. You can use the fridge to store food. The kitchen is not very large, but was perfect for breakfast. If you have no key, you cannot enter the hostel, so we felt very safe in it. Also there is a locker in the room for important stuff.
I would definitely recommend this beautiful hostel!