Jacqueline's studio is really cute and has everything you could need for a comfortable stay in Paris. It's really close to two métro lines (2 and 3) and not so far from Charles de Gaulle Etoile where you can pick up others. There are lots of shops nearby where you can get food and cook if you want. There is plenty of equipment in the kitchen to be able to cook proper meals.
I stayed here for a month as I have just arrived in Paris to work and while the studio isn't large, it is more than large enough to hold the contents of my two suitcases and eight boxes of stuff that I shipped over here and so don't worry if you think it isn't large enough, as it is. The wardrobe can contain a substantial amount of clothes and there are plenty of clothes hangers too which is really helpful.
The seven flights of stairs are quite something but do keep you fit. As long as you realise that they are there and are capable of climbing them then it won't be a shock.
Jacqueline is just lovely and so helpful and she and her husband have been really welcoming.
I will miss staying there.
Highly recommended, you should definitely stay here.