I believe charm of Paris is hidden in streets, in small boutiques cool cafes and secret passages. To discover these type of places, either you need a looong time to walk around and try every door, or you need a real Parisian friend who loves&knows the neighborhood. This friend can be Elsa for you :)
She really adores these places and can tell you a lot about them.
I think this tour is worthy, both if you re here for a few days and need to catch the spirit, or if you re living here but you don t know the city very well.
In both ways, you will have a great day.