It depends entirely on what you want your trainer for.
So far, folks who have these Knifezilla trainers, and maybe some of them will contribute more details here, all seem to like it for manipulation practice.
But, if you want it for sparring, well, that tip is still way to pointy. At first, I thought that the picture must be wrong. Perhaps just a reuse of a picture of one of the "Pacific Style" balisongs they sell. But, I've been told that, in fact, it's accurate.
For manipulation practice, you can blow $12 at I&I Sports and get one of theirs. It's not strong enough for sparring. There's a review article on my website in which you can see what happened to mine. But, for $12 it's fine for manipulation.