It's not a good 'un.

 So this is the brush set, all rolled up and that. Looking pretty innocuous.
 Fifteen brushes in total. My mum bought this like last year to give to me for Christmas this year, as it was reduced at the time from like £10 to £7, or something like that. I'm not totally accurate on the prices as this was a gift. You can buy brush sets on eBay for like a fiver, some of which I've been interested in. I'm sure they'll do better than this set, let me tell you.

Still, it's not all negative. The fan brush was a lot thicker than expected, which means it is good for applying pigmented blushes with a light hand, or for brushing away fallout.

That was it.

Seriously.

These ferrules came away from the handle the moment I removed the brushes from the packet. I am not lying.
There is a slight backstory to my first opening of this set. I was soaking my feet in a bucket (lmao, awkward) and decided to inspect the brushes while I waited. In typical fashion, I managed to drop the entire set into the bucket...yes, really. So I rescued them from their impromptu dunking, which only lasted about a second. I dried them off and left them in the air for a day or so.

When I came back to fully road test them, removing them one by one from the roll, I discovered that the four brushes above...were as they were. I was furious, and promptly double checked the rest of the brushes by giving them a small tug of the sort that might be expected when washing it or something.
 Within the brushes there is plenty of fail, too. You see the green in that brush? What on earth is green doing in that brush? That's just weird.
On closer inspection, it looks like dried grass. It was relatively easy to remove by pulling it.
In my hand, it does indeed look like dried grass of some description. Wtf. What is dried grass doing in a make up brush?