These are nice for what they are
348922
These are nice for what they are, but be aware that this is NOT chipboard as most people know it.  It's more like a thin cardstock, probably thinner than what is used for cereal boxes.
The silhouette cuts it really well though, and if you're looking for a natural color cardstock with even color and good texture, this works well.
1008697
A little lightly constructed, but for the price they are nice.
3125542
These are great for the money, but technically, they aren't quite 17 x 24... about 1/2 short all the way around. :)
4354091
These are a little small, as some reviewers noted.
2611031
These look very nice and are moderately functional for things you don't use frequently.  Not something that could take a lot of abuse.  I like it.
3547873
They serve the purpose, though they do slip down a bit.
4100813
Not the best quality. ...but they get the job done
3738336
These are good for our use. They are not as plush as the writeup would lead you to believe, but they are a bargain at the price. I would buy again.
3359923
These are smaller than what I'd expected, but that's my own fault for not looking closely enough at the details.

Besides that, they do what they're supposed to, and I have no problems with them.
1185245
It looks like some of them are "seconds." However, for the price, my wife can live with these.
4889596
A little flimsy, but that's to be expected. These were a good price for what they are. I'd buy again.
1061692
They work fine, but are a bit bulky for what they are.
3581491
They're on the long side but they are nice.
1221163
Not something I am going to use daily but, they are ok for weekends.
287450
I like these and they serve their purpose. The fabric is pretty thin, however.
261153
These are good for what they are. I used them in a steam punk project with an octopus, stars, keys and gears (sun catcher). They are very thin and light weight. I dunno if they would be good in jewelry that touches the skin, but would work in pins or broaches. Or on hats... I haven't figured out how to upload photos. :-(
1566586
These are ok.  They are not as high of quality as I would have liked - but they are very suitable for my purposes. I would order them again.