NordicTrack AudioStrider is called so because of the following feature: it has a stereo sound system on the console, and you can connect your MP3 or CD player to it. Those who like listening to music as they work out will perhaps appreciate it, but I personally did not think it was a big deal. I like music too, but what's wrong with listening to my player through earphones, as usual??
On to other features. The machine offers a 19 inch stride, which I think could be better. A taller person like me with wider stride could use more. AudioStrider has good size, comfortable foot pedals. I wear size 9 shoes; my feet felt secure and did not slide. I'm not sure how someone with smaller feet would feel, but there was still enough room for someone who is larger.
This machine has an adjustable ramp - not something all ellipticals have, so this is nice. In addition to changing resistance, you can adjust the ramp, choosing one of 5 available levels, and hit different muscle groups as you work out.
AudioStrider has moving arms that you can hold on to - some say to work your arms and torso, others, like me, mostly to keep the balance. :) There are also small handlebars with built-in heart rate sensors, which is a common feature today. There are 8 preprogrammed workouts; that's not a lot, but I usually stick to 3-4 favorite ones, anyway, so I find it enough.
Overall, I like this elliptical, but I wouldn't buy it just for the audio feature.