Here's a trick to uncurl this rug if you need to..
If you're having problems uncurling this rug, here is what I did to solve the problem. Just after you get it, roll it the opposite way so that the pattern is facing on the outside (usually the roll with the pattern on the inside to protect the visible side from getting damaged). Do so firmly and then just sandwich the roll between a chair and your kitchen table to let it remained rolled up for about an hour (or use a tie). Afterwards unroll with the pattern now facing up, so when you lay the rug on the floor, the edges will curl down and eventually flatten by gravity, or you can lay something on top, but it's a lot more effective this way.
I've actually had to do this with some other rugs this size, so I don't necessarily think the rug is specifically to blame for this. Personally I found it to be a good quality. Maybe not the best, but for the price, I'm not complaining, and the pattern does look as pictured so overall I'm really pleased with what I got.