Like all styles of yoga, Vinyasa has both mental and physical benefits. Physically, sweat expels toxins and re-energizes your body. Mentally, the synchronized breathing relaxes your mind and helps to release any blockage of energy flow throughout your body.
Bring a yoga mat, a towel, and a water bottle to stay hydrated.
Expect to move and breathe smoothly from one pose to another. Your class will most likely include Sun Salutations. Vinyasa yoga is almost like a dance with synchronized breath and movements; the style and sequence will vary depending on the teacher, so try a few different intructors to find a flow that fulfills what you desire in your practice.