The ProForm 505 CST Treadmill is a nice at-home treadmill. I bought it so my husband could roll out of bed and get his exercise in before going to work rather than making an extra trip to the gym. Though he says the treadmills at the gym are sturdier and have more features, he does say this machine does the job without the expensive features found on a $1000+ machine.
The one-touch speed and incline buttons are convenient compared to having to continually press an up&down arrow to adjust settings on other treadmills we have used. The built-in aux portal to listen to a smart device is another nice feature, but the built-in audio speakers lack quality sound and volume, which is annoying when the noise from running on the machine and the sound of the incline adjustments overpower the speakers. The other mediocre feature is the length of the platform, which is not that long for us. My husband and I are both tall (he's over 6 foot and I'm close to 6 foot). I have to run close to the console to feel like I'm not going to fall off the platform. If I were to start to get lazy in my stride or not keep up the pace, I'd fall off. However, there is a start key for the machine has a clip on the other end that you can attach to your clothing, so if you do fall off, the machine turns off.
Three features I really like are the 10x incline, the shock-absorbing springs, and the slated foot rails on either side of the platform, which turn inward toward the belt rather than lie flat. The foot rails have traction (bumps), to prevent slipping off on the side.
He assembled it in 2 hours; there were a few steps along the way that were awkward. He needed my help in a few steps: carrying the machine from our driveway, holding the console, tightening screws. O.Stock delivered the machine by freight in a week. The box came attached to a freight pallet. We unpackaged the machine in our driveway; there were boxes within boxes, some styrofoam blocks, wood blocks, and plastic bags in the box. It was a lot of trash, but the machine and its parts arrived in mint condition.
I have to warn people with sensitive noses as this machine smells like manufactured plastic and mechanic shop. It's overpowering for me. We've had the machine a week, and the smell, especially when in use, permeates the room. I have to crack open the windows, open the front door, and turn on the ceiling fan in the other rooms. I'm hoping the stink will dissipate with continued use.