Catalina's apartment is in an excellent location in the pleasant Batignolles neighborhood. There are plenty of grocery stores, butchers, bakers, take-out, and anything else you need within a couple blocks. It's also one block from the Metro, which can get you anywhere in Paris within 30 or 40 minutes.
The apartment is quite spacious for a studio and lets in a nice amount of natural light. The bathroom is clean and has everything you need. All in all, the apartment is perfect for a nice, affordable stay in Paris!