So i recently bought this product because i saw the commercial that said that you can burn twice the calories or running by walking on this. So my family bought it and i really enjoied it. There are different finacial choices for everyone, for example some have calorie counters but it costs extra money. i would suggest buying the cheapest one because its all the same machinery it just has different programs. You can use it wear you walk up and down like on the comercial or just walk like you would on an incline. my daughter used this and broke the gear or something that makes it go up and down evenly so i would say that is a con to this product that it could brake, but then again my kid used it and i have no idea what she did. if you get dizzy easily then i would suggest not to use this product because walking up and down might not be okay for you. The maximum speed it goes to is 3.5 mph