We had a wonderful time at Arie's place! It's super-conveniently located - we're big walkers and walked from there to Pere Lachaisse and Belleville, down to the Pantheon and Luxemburg Palace and Gardens, and to the Champs Elyseè and Arch de Triomphe, not to mention down to the Seine and the central museum district and the couple of blocks into Montmartre.
The place itself is cozy and has all the necessities and a nice audio-visual setup if you just want to Netflix and chill. There's also a ton of cafes, brasseries, and boulangeries within a very easy walk and plenty of stores and groceries nearby.
We didn't need Arie's help with anything while we were there but he was always super-responsive and replied very quickly - if we'd needed him for anything we're confident he would've been eager to help.