The check in process is simple, and the office to pick up the key is conveniently located within minutes of the main bus/train station. the luggage storage is also a nice touch, meaning you can enjoy your last day knowing that your luggage is already (almost) at the train station.
The apartment is lovely, big, nicely decorated and very clean. the location is also pretty good, you can reach the main areas of Prague within a few minutes walk. There were four of us on our stay, and it was perfectly comfortable. the beds are spacious and very comfortable. having two bathrooms for four people was also great for getting ready. The apartment is on the third floor, but there is a lift. the apartment is nice and quiet, close enough to the busy areas for convenience, but far enough away to be quiet, there are a couple of bars in the immediate area, but I didn't hear any noise.
Overall I am very happy with the stay here, I would happily recommend it to anyone looking for a place to stay in Prague, I would also be more than happy to stay there again.