The model in this review is the T 6.5 SI. My husband purchased me a new out of the box Nordictrack treadmill for Christmas of 2020. Used for 2 years and now it is not under warranty as it was manufactured in 2019. The treadmill simply did not power on as of 1/1/23. I have had a few calls with Support and they determined based on my description of the issues that it would cost between 800 and 2k to repair. For the 2 years of mild use, this was one expensive purchase.