Controls: The incremental, speed-control buttons are oriented as expected with the increase button on the top or right-hand side. They are positioned appropriately being right next to one another. The button size is considered fair making it somewhat difficult to operate while exercising. An alternative set of quick speed-controls provide the ability to select a few, whole-number speeds, using a limited set of control buttons. The incremental, incline-control buttons are oriented as expected with the increase button on the top or right-hand side. They are positioned awkwardly, being separated from one another. The button size is considered fair making it somewhat difficult to operate while exercising. An alternative set of quick incline-controls provide the ability to select a few, whole-number inclines using a limited set of control buttons. Display: The monitor displays white characters on a blue colored background. The size of the characters showing the "speed" is considered good and the size of the characters showing "incline" is considered good. Individual exercise statistics are displayed in separate windows. Programs: This machine comes equipped with 9 built-in exercise programs. A list of programs is convenienty shown on the console. There is no graphical illustration of the program's exercise profile shown on the console. Ergonomics: The step-up height to the running deck is 6.75 inches from the floor. This machine does not have a front handgrip surface. A partial side-handrail provides both security and easy access. Exercise: The minimum incline for this machine is 4 percent. The maximum incline is 10.4 percent. The manufacturer-stated, top speed is 11 mph. A top speed of 10.91 mph was measured. Construction: This machine features a motor with a 2.5 hp rating. The lack of floor levelers means there is no built-in leveling feature. Performance on our durability test - simulating a half-year of usage - was poor, showing significant signs of wear. Safety: The "stop" button size was considered fair. The plastic tang style safety-key disengaged without issue when a user approached the end of the running belt, which stopped the motor and running belt as expected. After the safety key was removed from its receptacle, the running belt coasted to a stop from a speed of 6 mph, in 5 seconds. The average stopping time for all tested treadmills is 5.7 seconds. When walking within reach of the control console, the motor housing which resides at the front of the running belt, created some interference with a user's feet, but it was infrequent.

The Sunny SF-T7873 is part of the Treadmills test program at Consumer Reports. In our lab tests, Treadmills models like the SF-T7873 are rated on multiple criteria, such as those listed below.

Ergonomics: Ergonomics considers how well the machine accommodates the needs of users and includes belt size, foot-rail design and handgrip design.

Construction: Construction considers aspects that impact quality like the motor and related components, running deck and the results of our durability tests.

Ease of use: Ease of use considers the ease of using the controls, functions, programs and reading the display.