We adored our little studio in La Marais. Jacque's friend Jean-Paul met us outside the apartment (we were running late because our flight was delayed) with a great big smile and proceeded to tell us everything be could about the apartment. Although his English is limited, we were able to have a laugh together while figuring out what each other meant!
The studio itself is very clean and well kept. Jacques has done well to make use of the small space, with the loft being a wonderful addition. I was in a party of 2 (myself and a female friend, both 25), which would be the ideal size for this studio.
We didn't "hang out" much at the apartment, instead using the space for a quick breakfast, somewhere for an afternoon nap, and also for a few drinks before heading out for an evening. If we had hung out more we would have made more use of the outdoor courtyard (but who could blame us with La Marais right on our doorstep!)
We did a heap of walking during our stay - all the hot spots (Louvre, Notre Dame etc) are within walking distance of around 15-40mins. If needed though, there are something like 3 or 4 metro stations all within 10mins walk which connect you to a multitude of different lines.
Next time I'm in Paris, would definitely stay again. Thanks Jacques and Jean-Paul!