Be aware of the 5 hour check in window! My train was late due to issues with the Eurostar, and I was in constant communication about it, but yet after I checked in she took time to thoroughly berate me and demand I pay the person who gave me the key for being 25 min late.
Also the flat is incredibly hot. I would exercise extreme caution visiting when it is warm as the flat has zero ventilation.
Overall, although the price was low, I would not recommend it to anyone.