On of the oldest and well-respected studios in Charlotte. I've been going to Yoga One off and on for about five years and even had a private class with my bridesmaids before my wedding.
They offer a variety of classes, most of them hot vinyasa power flow style and a handful of deep stretch and other offerings.
These classes are no joke. If you are a beginner tell the instructor because away you will go.
My favorite part about Yoga One is the assistance. There is almost always a hands on dedicated assistant in each class to get you deeper into your practice.
Recently, they've also added classes with music for those preferring a more upbeat practice. It's a nice option. They also have good karma and discounted classes throughout the day. Practicing here will push you physically and emotionally.