great little spot. super bright. but seriously, it IS tiny. ima 5'4 petite woman and don't think someone much bigger than me could comfortably exist there (although ceilings are high).
do note you're right near a Sorbonne campus, so lots of students who can sometimes be loud at night. aprtment is located next to a bunch of student bars who would often congregate on weekends right outside the door to the building and you have to ask them to move (they're polite! it's just a bit of a nuisance).
also, you're right by Saint Etienne du Mont - so expect chuch bells every hour starting at 8am.
overall, I had a great 2-month stay. hosts are extremely responsive, nice and accommodating