The apartment is nice, it has everything you need. I stayed alone for two months, for two people for long stay might be a bit tight. It has a stove and stuff to cook, but you won't need them, there are plenty of afordable food options around. The locations was very good, close to the metro, easy to go everywhere. The bed was not very big, still good for me, but if you are more than 1.80m tall, then you will have problems fitting.
The communication with Carris was great, I had problems with the wifi one day and he answered super quickly and tried to solve it as soon as possible.