Product was delivered with extreme efficiency - even sooner than I had expected, based on Amazon's delivery window estimate. I've been using the new walking belt on my treadmill for a couple weeks now. It's better than new (in the sense that I bought my machine used, and this is the first time the belt was changed.) It's nice that this product comes pre-lubricated, with a recommendation to apply the provided tube of lubricant after about 6 months of use. If the original owner had been as diligent about properly maintaining the belt, I might not have had to replace it yet. My only complaint about this product was in the instructions provided for removing my old belt and installing this one. They do provide several sets of instructions based upon what type of treadmill you have, but I still found that the most appropriate set for my machine was a little vague. Some more easily interpretable diagrams would have been nice. I ended up getting stuck about halfway through removal of the original belt because I couldn't locate a part on the machine that was referred to. At that point I just decide to `wing it', as far as getting the belt off. Then, having abandoned the instructions, I basically reversed my steps to get the new one on. After some minor adjustment to the tension, it works like a charm. Overall, I'm happy - with the product and the service.
Buy Proform 525 SI Treadmill Walking Belt!