I recently purchased this treadmill and love it. Its not to loud and runs smooth. Might I say that it also can put up with two kids who think its a toy. Its safety key is awesome. I've never have to worry about the machine turning on if my kids are playing with it. Its also reasonable with the purchase amount and if you can find it on sale its even better.
Proform 750 Treadmill is recommended by stephanieluvsjose