We were 5 and had a great stay in this apartment. The process to get the key is very smooth, there is a lot of space in the apartment and the location is next to the city centre whether by feet or metro.
A few things to know: the two rooms on the street side can be noisy due to the traffic so you may want to bring ear plugs if you are a light sleeper.
Also, do not expect welcome facilities such as shower gel, rubbish bag or coffee capsules. So bear in mind to arrange accordingly :-)