This is the 2nd Gazelle I've owned. I had gastric bypass surgery. Prior to surgery the doctor wanted me to lose 10% of my weight. I already had two knee surgeries, so walking didn't work for me. This machine does the trick. It's sort of like a glider. Very gentle on the joints. I had my surgery & lost my weight, so I got rid of my old machine at a garage sale. What a mistake! Although my knees are now doing very well with the weight gone, I really miss my Gazelle. Well 3 years after my surgery I bought another one. It folds up to save space. I don't have to worry about the weather conditions when I exercise any more. Watching tv while a work out makes the time go by fast. There's plenty of different exercises to do that work inner & outer thighs, chest & arms too. I love this machine & highly recommend it.