All good things come at a price. The 510Ef happens to come at a lower price making Diamondback Fitness’ advanced elliptical technology accessible to everyone. No details were spared in the design of the fully updated model with features like smooth, quiet sealed cartridge bearings rarely found on other ellipticals. An attractive LCD with comfortable lighting makes it easy to keep real-time track of progress through 20 pre-set workouts and 16 levels of resistance.