Christophe's was a fantastic place to stay in for our 7 days in Paris. You're 5 mins away from the Eiffel Tower, and we walked to the Aquarium (another 5mins away), Trocadero, and the Arc de Triumph from there. Metro station and RER trains were very close as well.
Disneyland was very little hassle to get to, as was Versailles. And we had a nice sightseeing tour on the river to take us to the Notre Damne and the Louvre.
You really can't get a better location than this!
The apartment was lovely, you just need to make sure you're keeping quiet going through the hallways and elevator, as it's quite easy to hear others. This wasn't ever a problem, with all our sightseeing.
A very warm, comfortable apartment + Christophe was very accommodating with our late checkin time.
Me and all my family would recommend staying at Christophe's!