I bought this attachment for my rack a month ago and I am highly satisfied. It gives good value for your money. There are small bubbles in the chrome plating of the rail where the weight holding part moves around but such is expected for the price you paid. Yet there is no effect on its function and effectiveness. Clean the rail properly and put a lubricant like 5in1 oil or white grease and you are in business. The assembly instructions need a little more time to decipher but is not rocket science. This attachment sees good action at least twice a week in my routine and is proving to be a really good investment for my health and fitness. Thanks again to my local Mississauga Treadmill Factory store staff, Kurtis.