Loredana's place is amazing! It is in a very central location close to many shops and restaurants. It's close to the metro that can take you to the big sights (Eiffel Tower, etc.) and even Disneyland. The place is a decent size that's enough to accommodate two people. There are lots of stairs (over 100!) to climb to get to the place, so if you aren't fit or can't walk easily, then maybe this isn't the best option; however, you'll be doing a lot of walking around Paris if you want to be economical, so it shouldn't be too big of a deal.
Loredana was an incredible host. We booked the place a couple of months ahead of time, and she gave us lots of tips and advice on how to get around Paris and places to visit. She even helped us get a taxi to the airport early in the morning.
I would highly recommend staying at this location. It has everything you need and a great host.