Easy installation and nice quality! I choose it to put over grass and some areas would not snap due to unlevel substrate. I used four boxes here of ten. I plan to put the sunasan  (like a papasan) I ordered from Wayfair.com on top of this snap flooring. Be aware for those with skin allergies to wear gloves, for the wood oil does come off onto hands during installation process. UPDATE: Not good over grass,for it grows thru it.