Staying at Melissa's place was great. It's a stone throw from the metro and buses and many places are within walking distance. The location is absolutely amazing.
The one flight of stairs is a bit narrow to climb, so I can see that being a bit difficult with very large suitcases. The bed was comfy, firm but not uncomfortably so and the pillows were amazing. I was sad I had to leave them when I checked out. Haha! The bathroom is a good size for Paris. I was worried about having to fit into a tiny shower when I was looking at places but the shower at Melissa's is roomy enough that I fit with lots of place. The WiFi was also very fast and easy to setup which was wonderful. The kitchen is small but I wasn't in Paris to cook five course dinners that was all right. The fridge is small so the freezer is even smaller so I would just remember that if you want to buy any big bags or boxes of frozen food. It's too bad there isn't an oven but the microwave and hob worked perfectly and I was able to make simple meals when I didn't feel the need to explore Parisian cuisine.
I really enjoyed my stay. I would say don't go expecting something grand, but if you want to explore Paris on your own terms and feel like you live there for a bit, it is wonderful.