Great place, exactly as described.
As others have noted: 1) it's at the edge of the 11th, which is perfect if you want trendy, legit Parisian restaurants etc. but it is not a heavy tourist area (maybe a 10-15 minute walk to Bastille, which is the outer edge of the tourist stuff). As a result, you'll want to be prepared to metro (super easy from Reuilly-Diderot station) or cab or long walk to to the major attractions; 2) it's in a large, un-charming 70s era building, which is why you get the spectacular views (most of Paris is low-build), so if you want some super-charming Parisian type space this isn't it, but if you want a killer panorama of Paris (Eiffel, Invalides, Sacre Couer, etc.) then this is your place -- everything looks much closer than pictures can depict!