yeah, going all the way down my save your knees a little (for some) but your back will suffer from it in a big way.. Also keep your back straight up, try not to arch it in or out, and try to keep it straight up and not lean forward or backward.. Have someone check your form from the side and tell you which way your leaning or bending.. You'll be surprised how far your out when you think you've got it perfect... Also, concentrating on having perfect form may mean you can't lift quite as much, but your reducing the risk of injury 10 fold and in the end you'll probably be able to lift more..