Actually, I'm a self-confessed fan Canon. Because the quality is right. Is probably more chance that my lenses all come from Canon. I am not necessarily brand Geil, the competitors could convince myself just kind of never really. But with those who already Geli is mostly there. Not at Canon. They want to see again and the money properly. On one hand, I'm also a little bit of stingy on the other hand I do not want to support the pricing policy of Canon. I once bought the Plastikdingsbums for my beloved 17-85 USM on the 500D. Meanwhile, I am also with the 70D and 18-135 STM go. On both lenses that thing fits sucking it in both positions and doing his job. Similarly, the cover.
Why the expensive original? This is brushed from the inside, as a felt-like covering. Certainly not bad but a dust catcher. And loving more expensive, but I see no profit. I'll part again in order to buy each of the two lenses his own Geli has to avoid having to switch back and forth.
Conclusion: Fits, inexpensive, does its job!
I hope that you can help with a purchase decision, if so, click it, thank you! ; O)