People who say that it is in the middle of nowhere need their head examined. Yes it isn't next to the Eiffel Tower, but not everything in Paris is near each other, in fact most things aren't!
The bar on the first floor seems to have a bit of a cult following, with regulars coming in that are always good to give advise on what to do or see.
Only thing to criticise is probably the second bunk being too high, the lockers should be moved from being under the bottom bunk, and both bunks lowered.
If I am ever transiting through Paris again, I'd definitely consider revisiting.