Mercury gives the best for obvious reasons and it is the ultimate commercial fitness treadmill. It is smooth and comfortable running surface and It is fit of your floor space and spending time on many things but maintenance. It has noiseless running material. It has great feels to run on the rubberized slats, their joints and connective tissues will also take notice. The Mercury will benefit your members and your bottom line. There are conventional treadmills and then there are Slat Belt treadmills by WOODAY USA. Our patented running surface is unlike any other.