My girlfriend and I had a pretty mixed experience at Marks. We arrived separately (my girlfriend first) and when she arrived at the airport we had a message from mark saying he could not come meet us to give us the key at the place/time we had agreed on, which led to a bit of a logistical nightmare without internet on our phones.
The apartment itself is quite nice, is well located, and the bed is comfortable. However, the bathroom emitted a bad smell at night, which needs to be addressed. I also recommend adding a shower curtain as the whole bathroom got wet after every shower. Overall I would give this place 3.5 to 4 stars.