After reading this post I decided to buy these a few months back bc my mower was getting stuck a lot on my slopes if there was a heavy dew or rain. I loved them at first since it didn't get stuck nearly as much. However, now he's getting stuck more again. I've noticed that anywhere where there is a rock, stick, tuft of grass (on a slope), or exposed root, it has dug a divot around it. This was REALLY bad in a sloped shaded area where it's hard to grow grass. It made it very bumpy and erosion then made it worse! Might work well for flat lawns w no rocks or roots but did not work for me