Dennis talks his gymnast daughter Courtney's experience rehabbing at SSL in this video (after the jump). You can also see Dennis's Testimonial about his own rehabilitation at SSL from a back injury. Below is a letter Gavin received from the Shannons.

Gavin,
We cannot begin to thank you for all the time, effort, and dedication you have shown to Courtney.  You were such an answer to our prayers, in this difficult part of her career!  You not only helped with her injury, but have taught her so much about fighting back, and kept her dreams of competing at UCLA alive.  We will be forever grateful to the love, and kindness you have shown not only to our daughter, but to our family!