We have taken wine tours all over the world, and this is our fourth in Tuscany, and Alexandra is the absolute best. She is phenomenally knowledgeable, but also very down to earth and a delight as a guide. She knows the region as well as anyone, and seems to have personal relationships with every winery. We visited 3, and each was fantastic. The tastings were intimate, featured amazing and unique brunellos, and incredible food. I cannot recommend her highly enough - it was the highlight of our trip.
Furthermore, we actually subscribed to her wine club during Covid (prior to meeting her - just based on other reviews). If you love brunello, it is a really fun way to have small batch vineyards (as well as larger producers) curated with wonderful tasting notes.