I didn't look closely enough when ordering this and would not have paid as highly as I did if I'd realized there were no spikes underneath to keep it anchored. Bought it to go with my son's new gaming chair (which is excellent; I reviewed it separately), and we cannot get it to stay unrolled even with the chair on it. Even though the pile is extra-plush/high in his bedroom, I wish I'd ordered a cheaper one for medium pile so it would have spikes underneath to grab the carpet fibers and stay put. The box also arrived in extremely beaten-up condition, but it didn't affect the product inside--just revealed enough of the contents for my kid to open it unsupervised and throw away the papers/packaging so I will keep it at this point. Hoping that we can take it downstairs (uncarpeted) and leave it unrolled under a super-heavy piece of furniture for a while to see if it will make the difference. Otherwise, kinda unusable.