Perfect location, in the heart of the 11e - lots of awesome wine bars and restaurants within short walking distance; metro outside the doorstep; short walk from Gare de Lyon and a little further to Gare de Austerlitz.
As I expect is the case with most Paris apartments, it’s quite small, but not uncomfortable for a single traveller and possibly for a couple.
Pauline was very helpful with check-in and recommendations for the area.