Not really. Once you unfold the treadmill you can see the crest but it fades as you use it.
Note that the treadmill is not meant to be used without footwear (as per instructions). I tried going barefoot/with socks, which wasn't pleasant, and realized quickly that it could get ugly really fast (sole of feet sticking to the rolling mat, socks slipping when you increase your walking pace, etc).

How long is the power cable please? Thank you!

I use the walking pad two years now. You have to get used to it a bit, but it actually works ok without shoes and socks. Just move the walking pad a bit so when you touch the pad it won't be the middle of it. If you don't touch the ridge, it's not a problem. In the beginning your feet have to get used to it while walking without shoes. Nowadays my feet are trained to walk 10-20k steps per day without shoes and without any problems or pain.