We were looking for a quality, affordable elliptical machine for our home, so we jumped on this one when it became available on Groupon Goods. After receiving two broken parts, waiting for Proform customer service for literally hours, and sending the company an angry social media message, we finally received everything we needed to put it together 2 months later. Now that we can use it, it's a sturdy and fits our needs. My major complaint is that the programs have preset times, and they aren't terribly intuitive to use. Otherwise, it works well. Performance The elliptical is sturdy, and it moves fluidly. It does squeak a bit going backwards though, and no amount of grease seems to alleviate that problem. Comfort The machine is very comfortable to use. The foot pedals are wide and adjustable, and the machine has the option of moving arms or fixed handlebars. The stride is a natural width, and the machine doesn't jerk as I've experienced with some others. Ease of Use It's easy enough to get it going; all you have to do is step on and start moving. That said, figuring out the programs takes awhile, and the time settings are fixed on them (which I don't like). Durability I'm rating this one in the middle because we received two cracked parts (both sides of the main frame) when we first received it. The pieces were cracked in such a manner that we couldn't put the rest of the machine together until we received the replacements. Beyond that, the machine seems durable. Design The machine features an ergonomic design; It's large, but it's not an eyesore. It's also fairly easy to move thanks to a handle on one side and wheels on the other. It took about 2 hours for my husband to put it together with minor help from me.