“For 730 straight days ran 3 miles @ 6 MPH without fail -Reliable”
I purchased my first sears tread mill in 1989 and yes I still have it. I can't get a belt other than that it is in great shape. Several yrs ago I purchased a Pro-Form XP 550,s and I have found it to be reliable. For example for three straight years I ran every day , yes every day, for 3 miles @ 6 MPH without fail. I found the treadmill Reliable.
Lately after owning it for 4 yrs, it started to have a few problems that were not corrected becase of the lack of experience of the repairman. In due respect Sears has sent extremely qualified repairman that fixed it.
If you select this model I highly suggest that you either buy sears extended warranty's or buy the extended warranty's direct from the manufacturer at reduced cost and a repair person with factory's knowledge will be able to repair it. The manufacturer warranty's is less expensive and you buy it direct because Sears is not involved.