I stayed 1 night at Petter's lovely, peaceful and well-appointed flat in an excellent location, an easy 10-12min walk from Gares du Nord & de l'Est. The bed was especially comfortable and I appreciated the quietude away from the busy streets at night - you will get a good night's rest! Very spacious 2 pièces by Paris standards, and additional bonus to have access to privage green outdoor space.
Note there is no kitchen - just microwave, kettle and (essential!) drip coffee maker - and the bathroom is a wet shower room. These features are fine for a brief transit traveller or visitors to Paris who don't intend to cook meals at home.
I am a solo female traveller and found the area safe and easy to access, but I am also very familiar with Paris. This part of town is a typical transport hub, so not known for picturesque beauty.
In all - recommended!