Pros: build quality unparalleled
If you want a treadmill to use for the rest of your life and not call any repairmen, this is it. I'm not an exercise buff, my wife is. This thing actually provides for a modem hookup via computer/Internet so you can run against a training regimen set up by iFit.com's website which you become a member of when you buy the thing. It has a heart rate monitor, remotely controlled, and folds up to the size of 1/4 the depth of a new refrigerator.
I ran the pre-programmed fitness test and came out at 80% fit which made my wife (at 70) green with envy since she'd used it way more than I had. The computer on board calculates this based on your heart recovery rate after punishing exercise. The thing inclines too. You just run - it thinks and does its thing. Or you can manually do stuff as well. It also has a ski-doo like kill switch you tuck into your belt, cup holders, LED readouts that are completely intuitive, and smells great as well with a textured belt made out of some kind of rubber that's great to run on and adjusts for softness/hardness. I don't ever plan to replace this unit and have seen some basic models that are a joke compared with this one - but you have to shell out around 3500 canadian dollars for one.