This is a perfect place for a family visiting Paris for a few days. We stayed here with our 12 and 14 year old boys and it was SUCH a great location.
It's important to note that while this location is impossibly good for just about everything (access to 3 different metro lines, really good asian dining right below, Louvre in walking distance, Opera, etc. etc.) it's also noisy. I don't think this would be much of an issue in winter when windows are closed, but during our visit in summer, we needed to have the windows open to get a breeze through as there is no air-conditioning and the noise from outside is really loud. Just keep it in mind, especially on Friday and Saturday nights (or keep the windows closed!).
Really happy with the text messages in the lead up to check in and we were greeted by a local who met us at the house, showed us around and answered questions - this was brilliant and not something I expected.
All in all, a really great place to stay and one that we'd be happy to book again - especially in winter.
PS. You'll note from the description that the roof height is low - yes, being over 6' tall, I did bump my head a few times, but the rest of the family was OK. Don't let this put you off renting here - it really is an awesome place!