I ordered the VEVOR Snow Melting Mat 2023 New, 10 x 30 inch, 3 in/h Melting Speed, Heated Outdoor Mats for Winter Stairs, No-Slip Rubber w/Plug, Power Cord, Outlet Timer, Reflective Strip, Velcro, Ground Stake to help me keep easy access to my back deck during the winter. We haven’t really had a ton of snow yet, so I am not in a rush to put this out. The first thing I will not is that the odor of the mat is horrible. I am not sure which component or layer of the mat it is, but the chemical smell is overwhelming. I opened the box 3 hours ago and had it on the floor about 3 feet away from my desk. I was very aware of the smell and even got nauseous and developed a headache. I took it out of the box and unrolled it and let it sit another hour. The smell seems to have dissipated a bit, but not completely. The 10 x 20 is perfect for covering a standard stair – so I can totally see why they designed these to connect. I can’t speak to if they are truly non-skid on the steps, but I do like that they included stakes to secure the mat if you are using it on the ground. As far as the manual – it is thorough, and I will say that programming does seem a bit complicated. I do think I will try this with a smart plug to make programming a bit easier.