Cons:1).The plexiglass sheet I received is actually 11-7/8” to 11-15/16”, as several reviews have stated. It is certainly not 12” square. That didn’t make a huge difference to me other than making for more complex measurement calculations for my intended purposes, but I can see how for some it could create an issue. Know that before buying it.2.) Product does come alone in a cardboard box. Mine did. I didn’t buy any additional items in the purchase, so other items may be combined if more are purchased.3.) While not specifically exclusive to this item alone, this material can be somewhat difficult to cut or drill if the right tools/methods aren’t used. It isn’t obnoxiously hard, but it is dense (if that makes any sense). Sharp cutters and drill bits are a must. Slower speeds will cause chipping, while speeds too high can cause moderate melting. Finding the right tool to modify is essential. Oh, and wear a respirator if cutting or drilling it. Milling this stuff stinks. I don’t think the off gas or sawdust from milling it is harmful, but the odor of the milling process is worth wearing protection alone.Pros:This product is amazing. Too many positives to list numerically. Although I haven’t measured it’s thickness with my calipers, it appears to be spot on at 1/2” thick. It’s super robust and seems to be amazingly strong. It comes with a sticker backed/adhesive backed thick paper film on both sides. This was beneficial for moderate scratch protection prior to use or application, but I found it most helpful for marking with a pencil for alterations, cuts, hole drilling, etc, which is impossible to do with a pencil on the plain plastic, unless you actually scribe and scratch it or use a Sharpie style marker. The crystal clarity of this stuff is out of this world. More clear than ANY actual glass I’ve EVER seen. I’m actually so impressed with this product that I’m trying to think of more things I can use it for to buy more. I made a router base plate with mine and this product was clutch! It was almost like it’s the perfect material, size, and dimensions for this. I couldn’t imagine anything working better.