I stayed at Christophe's place for a long weekend together with 5 friends, and we couldn't have chosen a better place. The location is amazing. Walkable distance to many tourist attractions, bus stops, subway, restaurants etc. Nice view of Tagus river. Stunning decoration and brand new appliances. Comfortable beds and beddings (even the sofa bed!). Good internet conection.
The only downside was the power of the house and the water heating. Although it was pretty simple to solve (simply by just pressing a button), we couldn't turn on some appliances at the same time (like oven + heater) without shutting down the whole apartment's electricity. We also were unable to take warm showers at both bathrooms at the same time, or wash the dishes while someone was showering without the water getting colder. Since we were in a group of 6 and it was winter, this definitely had an impact on our time management.