I don't think this is absolutely terrible, but there definitely are better blushes out there in that price-range. I have the shade Medium Pink, which is a sheer true pink with a fair amount of shimmer. Despite the shimmer, it actually looks very natural when on - creates a more glowy effect than a super sparkly one, which is nice because I prefer a natural look. It /is/ fairly sheer, but if used with a more dense blush brush the colour can be built up quite a lot. So I don't think it's awful.
However, I wouldn't repurchase, because it isn't outstanding in any way, and it can be a little hard to blend sometimes (surprising for a sheerer colour) which means that it can take a while to get it looking nice. Frankly, I can't be bothered to spend heaps of time on a natural blush colour every morning, so I tend to reach for something a little more blendable and quick to apply (e.g. my Australis cream blush or Jordana powder blush).
I bought this expecting to really like it but its the complete opposite, the pigmentation is horrible, doesnt even look like you put any on?