My girlfriend and I booked four nights in a Standard Apartment.
The apartment was very clean and much bigger and nicer than we expected for this modest price.

On arrival, we were welcomed with a tulip and confectionary (it was International Women's Day) and the receptionist was very friendly and gave us a map and some helpful in formation about the public transportation system in Prague. We first were assigned the wrong apartment (one without bathtub), but the mistake was corrected in literally 10 min. without any trouble.

Our apartment was on the first floor, the noise from the busy street right in front of the hotel was no problem due to the double windows (nevertheless, if you have a light sleep, we'd still recommend to use some kind of ear protection, since there can be the some sirens heard at night ). The bathroom (with bathtub) was very nice and clean and equipped with a towel heating element, which kept the towels dry and warm all the time. The living room was very spacious, the dining table, bed and wardrobe, as well as the other furniture were as good as new.
The kitchen was equipped with a basic cooking set, dishes and refrigerator (without freezer though), entirely sufficient for two guests. We wanted to cook our own food and prepare our own breakfast, so having a nice kitchen was important for us. There were plenty of sockets in the apartment as well. Even though they are all "Type E" sockets, plugs of "Type C" that are common here in Germany worked perfectly fine. For other plug-types you'd need an adapter.

Checking out was just as quick and simple as checking in ( about 5 min. each).

The apartment is pretty much in the central area of Prague and the nearest metro and tram are only 3 min. away.
We enjoyed our stay at this hotel and would recommend it to others.