Yes your muscles will burn for sure if you have no occasion to use stairs in your daily life. Inner knee, outer knee muscles are deeply targeted which is great for me personally. Exercise bikes do not hit those muscles at all for ‘me’ so this will be awesome to enhance and strengthen daily motion! Easy out if the box set up, easy to use if you have good balance which thankfully i have always had. (I used to take Ballet lessons when young so it is ingrained into my movements already.) If you lack balance take it slow initiating the first step and into the 2nd step fully on the device. It is a neat design how it functions, creates resistance, simple yet intelligent. I gave 4 stars in one part only because it does not include any wrenches for nut/bolt tightening checks, (which should be done before every use) and not everyone has the sizes needed or even ‘any’ wrenches or socket sets in their homes. I am a tool nut so i do but at the very least a set of generic flat double ended crescent wrenches should be added to the box…