My gym has about 15 of these, and I've probably used all of them over the months since they got them. PROS: As far as comfort, this is a very comfortable treadmill. If I run enough miles on a cheap treadmill, my Achilles and knees ache. However, there is more to a solid machine. The speed eases up smoothly and sensibly. It never jerks. Similarly, the incline is never abrupt. Very nice feature. The heart rate monitor, the one on the handle bar, is sometimes inaccurate when compared to my own heart rate monitor. Entering my weight and speed and incline and it shows my calories burned. For me, this is just a curiosity, but it shows consistent data. CONS: The biggest issues I've had is with the touch-screen buttons. They are hard to push. Same goes for LifeFitness's elliptical trainers and stationary bikes: they all exhibit functionality problems with the on-screen buttons.