Got a hack squat machine from titan fitness for my physical therapy clinic and what a disappointment... The locking mechanism completely missed the hooks on the sled, the handles on the frame collided with the handles on the locking frame (so it hit another handle but not the hooks it's supposed to catch), and the adjustable pad on the slide frame was not welded correctly to let the locking pin slide into place. Tried for 3 weeks to get in contact with the rep from customer service who replied to my warranty complaint, but she kept dodging my calls. Will never use Titan Fitness again.