I've been using this without any problem. Things like and ink pen were dropped on it without a problem.One night I heard a noise in the house. Couldn't figure it out until I walked into my office and found the mat completely shattered. I mean completely! It'll take hours to clean it up.It is not worth the price, since I will have to take time away from my telework and vacuum and sweep glass. I do not recommend this mat.This is the first time I have ever submitted a review on Amazon about a product. I love this chair pad, it is so classy and such a nice mat in my office/quilting room. I bought this pad two years ago, and just two weeks ago I stepped on it and it broke into a million pieces. Not shards, but small pieces like the glass you use in firepits. I do have it on carpet, not a hardwood floor. So why am I leaving an excellent review for something that broke? Because the customer service is incredible even after 2 years of use. Lifetime immediately sent a new one and it arrived with substantial packaging and quickly. I would buy this mat again, I love it regardless of the random breakage. And knowing of their guarantee, you'll be safe in purchasing it.The carpet in my office doesn'a appear to bee very thick but does have a premium pad underneath. So I tried a chair mat first from my local Office Depot that was rated for medium carpets and immediately realized it wasn't going to work. The chair wheels caused divots almost instantly and I couldn't move the chair. I returned to Office depot and got one for deep carpet....again a failure so I did some research on Amazon and tried another "heavy duty" acrylic chair mat. That one did not work either. So, I bit the bullet and spent the money for this mat and I should have started with this one first. It works great and looks fantastic. It adds to the look of my office instead of looking cheap like the acrylic ones. It comes packaged well. Again, save yourself the time and just get this one if you plan on using a desk chair on carpet.The smooth and sturdy surface makes rolling my chair much easier than before when used a softer mat. The only problem I have is keeping it in place though I have not yet chosen to use the velcro strips that came with it. Keep hoping it will sink into the thick carpet on its own given how heavy it is.This was a gift and he can't shut up about it. He freaking LOVES this thing. His old plastic one cracked and actually stabbed him in the ankle. Now he glides, which is amazingly graceful for a giant. We were afraid he'd break it, crack it, chip the edges (he's 6'8" and has girth), but it's sturdy and surprisingly strong. Also heavy as heck, so get a giant or two regular sized men to carry it, in our case, upstairs.This is a fantastic floor chair mat. This is the first glass chair mat I have purchased and I will say this, I will never purchase anything other than a glass chair mat again. Crystal clear over my area rug. This chair mat looks beautiful, stunning and functions perfectly. The chair rolls easily and although this thing is made out of glass, I'm guessing this thing might just last forever. Well, nothing is forever but, this is a fantastic product. I love the way it functions and looks. If you have the bucks, just buy it. You won't be disappointed.This is a great product. Beats those plastic mats any daySo far so good. My carpet is crazy shaggy & plush so no plastic mat worked. I was happy I came across these glass ones. They look great and work fabulous! They are more slick but I like that. Packaging was tedious to undo but that's a good sign.. my glass was in tact! The only down side to the glass is I wanted a wider piece that was closer to being 4x4.5 but this will do.