Hello,
My family and I recently visited Bhutan (using Bhutan Personal Tours as our guide) and it was an amazing experience. Our guide, TP, and our driver, Karma, made us feel welcomed to Bhutan from the moment they picked us up at Paro airport. We visited four areas (Thimphu, Paro, Punakha, and the valley), and TP was extremely knowledgeable about each location. The accommodations that TP had set up for us were pretty good as well. I was traveling with my younger brother, uncle, and grandmother, so TP made sure all of the arrangements accommodated each person. If we had any questions or concerns, TP would address them right away. It really was a "personal" tour that was tailored to our likings and at our own pace. I would highly recommend using Bhutan Personal Tours and would rate my overall experience as a 9.5/10.
(I would also highly recommend hiking to the top of the Tigers Nest in Paro.)
Hope this helps!