I have now stayed in apartments rented through Guest Apartment Services Paris twice in a little over one year. I can't say enough about the communication and support that is given from the time that you make your first inquiry to after your final checkout. The staff are extremely knowledgeable and helpful, and will do whatever is in their power to ensure that your stay in Paris is everything it can be. I stayed on the Ile Saint Louis both visits and have loved both the location and the apartments themselves. The price is so reasonable for everything you get. I know that I will use them the next time I am lucky enough to plan another trip to Paris.