I have been using the arc for 8 weeks now, having followed the 6 week programme followed by the maintenance. My 7 year old Oldenburg x tb was diagnosed with mild hindlimb PSD and sacroiliac trouble. I have used the arc throughout his Shockwave and Chiropractic treatment. I am completely shocked at how relaxed my horse is when he is wearing the unit. One of my biggest testimonials comes from the overall body balance of my horse now. He has never stood square behind, and was always shifting weight to take off pressure. Since using the arc equine he is now standing square behind and taking weight evenly through both hind limbs! I would definitely recommend this to anyone having issues with their horses. I even ride in my arc unit! I would not be without it now.