Seeing as we [my wife and me] live in the middle of nowhere; 35 minutes to a gym and its cold as hell outside, we just got a precor efx 5.23 elipical trainer. Just did the heart rate program for 30 minutes + 5 cooldown that was harder than I though it would be. 23 min in zone ,max 182 ,avg 123. Its going to take a while to figure out the stride my feet wanted to be more forward than the foot pads allow. it has the adjustable ramp and whoo boy it burned the hamstrings above 12 degrees.