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By Alexis1966 (Greenbelt, MD) on Jul 19, 2013
Comments: I'm every bit as happy with this treadmill as with the Pro-Form CX10i that I got in 2004 (still using it but the electronics are getting flaky). The deck of the 400c is comfortable and the belt moves smoothly; it's a very ergonomic machine. Although this was the least expensive model, there was no compromise in quality, and I'm confident that it was built to last.