Summary: Yes, it cracks. It's brittle plastic. But it works. And it's a lot better than no hood. And the only other choice, a cheaper non-Nikon product is probably worse.
Summary: This was a chance I took. However for your future reference regarding replacing the original lens hood for the 20-35mm Nikkor D 2.8 hood, this one does not work.
Summary: I had lost the original lens hood for my Nikon 17-35mm lens a while back. This replacement hood has been a wonderful reunion for my me and my photography.
Pros: Durable, Easy to Use, Improves Function, Lightweight
Summary: I bought 18-35 lens as used and it didn't come with a hood which became quite a problem. First I tried some no name hood but the vignetting was a problem.
Pros: Durable, Easy to Use, Improves Function, Lightweight