Yoga Flow SF - Union is a serene and spacious yoga studio located on the second floor, filled with natural light and breathtaking views of the surrounding trees. The studio offers a range of classes, including heated power vinyasa and non-heated yoga, as well as yoga teacher trainings and workshops. The instructors are friendly, inclusive, and knowledgeable, providing a balanced practice experience. The studio's cleanliness and amenities are also noteworthy. However, some students may find the classes to be fast-paced and repetitive, and the music can be loud and distracting at times. Additionally, some instructors may be overly dramatic or focus on themes that stray from the traditional yoga practice. Despite these minor drawbacks, the studio's beautiful setting and welcoming atmosphere make it a great choice for yogis of all levels.