Test the treadmill yourself. Reading the consumer report treadmill guide helps. But trying the treadmill equipment out can really make a difference in your decision. Reviews are supposed to just give you pointers on things that suit your need but still the decision is yours. So it's best to try the ones that you've pre-selected from reading.
Finding the best treadmill for your workout can be complicated. That's why Bodyguard fitness made this guide so you can find the best treadmill for your budget. Often, the price is the most significant factor in choosing a treadmill. Cheap treadmills that just go to walking speeds are available for under 500$, but quality treadmills made for running cost generally more than 1000$. High-end treadmills costing more than 2000$ will get you many features unavailable in cheaper models, like an heart-rate monitor and a lifetime warranty. Although it may seem expensive, it will definitely worth the investment over-time, especially in the used market.