I haven't been a fan of Smith machine squats. However, have done some work ln it the past few months, though I still rely on regylar squats as my primary. A few observations.. 1. For ME, I can only go ATG on the the smith, because in order for me to get that low, I have discovered I have to put my feet a good foot in front of me. Ar 6 2 +, try as I might, I really can only hut parallel with the free squat, even with just the bar. 2. I can use more weight on regular squats 550 for 9 today, versus maybe 405 on smith. 3. I get a better pump on Smith , at least in the quads, but hit the overall leg more with the free weight. Hope these observations can help someone. Ps Happy squatting, still the best overall exercise!