Stability: Nautilus home treadmills are known for being strong and sturdy. The T516 is foldable but supports users weighing up to 350 pounds.( Also have other treadmills) just scroll over) Originally price was $2500 Motor: The T516 has a powerful 3.0 HP continuous duty motor. This can easily support a runner’s daily training. Users can reach a top speed of 15 mph. Track: Nautilus’s patented Softrak suspension deck reduces the impact to users’ joints and has received excellent customer reviews. The 58” track is long enough for most users. Incline: The T516 offers a 15% incline, which is significantly greater than the typical home treadmill incline of 10%. Console and programs: The Nautilus T516 is loaded with 26 workout programs. These include 4 heart rate programs, which are used in conjunction with an included grip monitor, and 9 time/distance programs. The console can save four user profiles. Progress is monitored with backlit LCD windows. Compactness: Nautilus machines are best for homes with plenty of workout space; the T516’s footprint is 78”x32”. However, the machine does take up less space when SoftDrop folding technology is used.