Alex is a great guide. He knows Paris top to bottom, and is a gifted story teller to boot. He took me to parts of the city I can guarantee that only a handful of people ever get to see. He's flexible and can help you plan an experience that's unique to what you're looking for. If you're looking for a real adventure, I highly recommend connecting with Alex.
Johanna is a charming and knowledgeable guide. She's a wonderful conversationalist and her knowledge of the city is encyclopedic. We spend the day exploring some great stores where she knew when and where the best things would be. I highly recommend this tour.