Seymour was an excellent host. Very welcoming, helpful and always responded promptly. The apartment is in a great location, very convenient for us (very close to the campus of Univeriste Pierre an Marie Curie) and also close to the major tourist attractions, Notre Dame, etc. The apartment easily accommodated us (two adults and a child).

The only issue was that the weather was exceptionally hot (up to 40C during the day) and the apartment had no air conditioning (like most apartments in Paris, I suppose). Seymour provided a fan but it was still rather hot. On the plus side, the apartment had windows on two sides and the airflow was decent.

Also you need to be prepared to walk five stories up as there is no elevator. It did not bother us.