Great seller but product is notorious for warping/expanding from heat.
345977
The battery arrived quickly and worked fine but expanded after only a few months. I only marked down 1 star because I suspect this particular samsung battery is just prone to warping from the heat. I have had two batteries expand using the focus phone and my brother had his battery expand in his as well.
50721
Be careful about heat exposure. Plastic melts easily.
1084439
I went off the great reviews, despite seeing some about it being warped. I thought, surely with so many good reviews, the outliers were just using it wrong, heating it too hot, or something. Guess not. Guess some people are lucky and some aren't. Perhaps certain sizes are more flexible, or perhaps they have quality assurance issues in-house. I do most of my oven-cooking at 350-400, with maybe one 450 use. This thing is definitely warped. It's basically bowed from corner to corner, as if it's trying to curl up.

I gave it 2 stars because it's still functional and works, but when you are working with a warped sheet, it fidgets around a lot on surfaces since it won't lie flat. I don't do a lot of baking so it's not the worst thing in the world, but I'm super disappointed that they call out that this thing is thick and won't warp, but it warped almost immediately. I specifically bought this product for that, plus that it's USA made.
230749
Great non-stick surface and solid overall feel, but the center warped soon after regular use. Returned and moved on a Scanpan, which has been great so far.
1177525
This weatherstripping is pretty nice.  It is easy to work with and you can apply it pretty much anywhere.  I'm using it to seal up a place on the driver side door where there is excessive wind noise.  (It's a new Pilot. Honda no longer cares about their cars.)

The problem I have with this is the way it was shipped.  It was oddly rolled up in a way that left it all creased up and folded.  It stretched it in some places and made the adhesive protector come off.  So now some of the adhesive sections aren't very sticky.  I think it is still usable, so I'm not sending it back or anything.  It was just a bad way to package it.

I was given a discount for reviewing this.
247195
The metal could be sturdier, as it can be bent when heated up fully. This distortion can also happen over time, and I think the metal construction could be more solid to avoid this.
2197130
They curl up easily under heat so I have to continually bend them making them even more warped. I will see if there is a better type of material out there even if it costs more.
200092
I bought two of these. Both warped on med heat in the first couple uses. I will be doing a second return and looking elsewhere. Probably All Clad, though I was hoping that these would work out so I could save some money.

I also have the 12 piece set and the saute pan has started to warp as well
1915447
After two months of use, I really like these. They warp a bit (as all flex mats I've seen do), so I often leave them on the counter.

My only complaint is the barrage of emails from the vendor, especially those begging for a review, but I decided to write a review despite the irritation because the product is great and the price for two mats and two towels was reasonable.
661466
The black foam on the sides are melting from the sun. The blue cover is bubbling up from the heat. I live in Maryland. Quality is not there. How do I get these parts fixed? I can send you pictures.
2634020
Nice size and super thin but really not made for using at high heat.  It warps and gets extremely soft when you use it at higher heat.
2934676
Love the looks of this peel, and is great for transferring pizza or bread to and from oven - but left a hot pizza on the board to serve and it warped/bowed the board badly.  After wetting well and weighting it with 30 pounds of books for a week, it is flat again - I now remove hot pizza or bread immediately and it is staying flat. Since serving pizza was 1/2 of my reason for purchasing, it is disappointing that it can't be used it for that.
2960403
Use for 2 months. Temp indicator is hard to tell what setting is on. Makes loud pooping sound when turn on and has moister inside heater. Email seller (lucky shop) respond promptly and gave full refund no question ask. Very good seller.
3729559
Received item slightly warped.  Not enough to prevent use because I have a commercial flat top and will only be using the grill side.  If I had to use the flat side to make pancakes or something similar it would have been an issue because the product would come out slightly misshapen due to the warping.
3965832
Product was decent quality, but being thermal paper, half of the package was damaged from heat, making all the outside rolls multi-colored
2559509
I needed these to use for bases for many gingerbread houses. They're the perfect size, and they're (just) strong enough for a 6-inch square house. The 3 star rating is because they arrived warped, and stayed warped, even after 24 hours under the heaviest books I could find.
2919066
after owning for a year or so. they start warping around the edges.  however, they are excellent at keeping the dirt, water and grime off the carpet. just wish they wouldn't warp.  maybe due to the heat