The best treadmill is the one you'll use on a regular basis and the one that meets your wants and needs. If you're looking for a more mentally and physically engaging workout that may burn more calories and help you develop lower body strength, a manual treadmill might be best. Plus, manual treadmills can be set up almost anywhere and tend to have lower maintenance costs. If you prefer treadmills with built-in programs, entertainment options, more incline options, and other special features, then an electric treadmill is probably best.