2 hrs per day on the Zero Runner 5x per week is my new stretch goal! First, no I am not a marathon runner. I was just looking for the best machine to keep my weight down and reduce some of the reoccurring injuries I had been experiencing from running. After having minor surgery on both knees prior, and turning 46, I was on the hunt for a quiet, low impact machine that was effective enough drive my heart rate above 130. After testing out several diferent machines, I knew the Zero Runner was the one for me. If there was a “love" button I would hit it for these features. (1.) So quiet I can run at a full sprint in the room next to my 5 year old son’s with minimal vibration or noise to wake him up. (2.) I don’t feel beat up after a long workout. If I had been on treadmill for 2hrs, I would need to take a long nap, plus might soon start feeling knee, achilles and/or back plan for the next couple of days. I actually feel refreshed with no pain, and ready to tackle the day on the Zero! (3.) Finally, I love that I am dropping weight again. Down 12 lbs with more to go, and I think it is great that I miss this machine when I travel for work, because it such a good workout. Can you get Zero Runners in Marriott Hotels soon please? :) I have finally found the right workout! Thank you Octane Fitness!