The Horizon T6 treadmill goes big on features – a large motor, 15% incline, and 400-lb user weight limit – and leaves off the frills. It is a good choice for runners & serious walkers looking for substance over entertainment features.
The LED dot matrix control panel shows workout feedback in a 10" x 14" display. The 10 pre-set programs include manual, intervals, mountain climb, weight loss, pacer, custom, and 2 target heart rate workouts.

The specs of the Horizon T6 are:

UPDATE: The Horizon T6 treadmill has been phased out. Take a look at the latest Horizon treadmills to find a comparable model.
The Horizon T6 treadmill is a non-folding model powered by a quiet 3.0 CHP motor and features a 2.2mm orthopedic belt, a 20" x 60" running area, speed range of .5 to 12 mph in 0.1 mph increments, and a thick elastomer cushioning system.
Reviews like how the treadmill stores training logs for up to two users – right on the machine, so you don’t have to download anything to a USB flash drive and transfer it to a computer, or sign up for an online membership. The Horizon T6 records monthly and lifetime mileage goals for up to 100 workouts, as well as calories and average pace. If you like a handy log of your training progress, you will like how the T6 does it for you.
The Horizon T6 is $2,199 with great specs and a nice design, although it has an oddly weak parts and labor warranty for a machine this pricey. As Horizon’s best home model we would like to see it backed with something like a 5-year parts, 2-year home servicing warranty; otherwise, you will have to purchase extended coverage which will add to the overall price.
The Horizon T6 treadmill is a nice machine for performance training, but the value slips because of the warranty. (As a comparison, Smooth Fitness offers a lifetime parts & motor warranty on its 9.65LC model, also priced at $2,199.) If Horizon could only improve the warranty, then it could start to compete with the leaders at this price, such as Smooth, Sole, Lifespan, and Precor treadmills.