There plenty of resources of things to keep in mind, and of course, every company or salesman will tell you that their's is the site for you! Before you purchase any treadmill you want to consider the features of the treadmill and whenever they meet wants. http://Git.ibossay.com:3000/bobbydelano237/8061584/wiki/Nordictrack+Treadmills+Review+-+The+A2550+Verses+The+A2750+-+Pro+Lines