• Training is often done in a private
• Workouts are built around you and do not generalize what works for a group.
• A session is small enough for your trainer to pay attention to detail and form while still repeating the benefits of one-on-one training.
• You have some say or autonomy in the exercises that you perform.

Semi-private training is also typically significantly cheaper than personal training, and it helps to keep more in your pocket while still getting the unique training feel.