By no nickname please (Clarksville, TN) on Feb 18, 2012
Comments: I wrote a mixed review about a year ago when I purchased my Proform 400 CT, but would like to give an update. This treadmill IS quiet, like the other reviewer said, and although a very heavy machine that has to be left in one place, we love it more each day. YES we DO USE IT. We are in our 70's and don't have much choice. One thing I regret is not buying the extended warranty. To have to replace this one when the time comes and experience the agony of assembling a new one is out of the question. So far, it's working fine. This model I do highly recommend.