The running deck is somewhat modest at 55 inches long, and the Proform Performance 400 treadmill folds up after use, making it very suitable for cramped conditions. The stated maximum user weight is 300 lbs.
The top speed of 10 MPH, maximum incline of 10 percent and a 2.25 HP motor are all quite modest compared to more expensive treadmills, but not bad for the price.
The LED display is simple but easy to read and 15 training programs are plenty.
Extras include heart rate monitoring with handlebar sensors, built in speakers and iFit Live capability though you have to get the wireless adapter separately.
For the price, the warranty on the Proform Performance 400 treadmill is not bad, lifetime on the frame, 25 years on the motor and 1 year on parts and labor.
Ultimately, the Proform Performance 400 treadmill is best suited for walking and light jogging but with that limitation deserves serious consideration when on sale at $600.