That is interesting that they have such a similar product to the Loc Bloc rulers. I wonder who came first. Their pricing is similar as well.
However, the big difference is how the Bloc Loc rulers are designed such that the lip of the inner bevel "locks" up against your seam line (assuming you press to the side of course) so you don't have to do any manipulation/sliding to make sure the seam is along the center diagonal. I was able to trim up 128 HST in very, very little time with much less effort and stress and every single one of them are perfectly cut with the seam in the exact middle.
Now I just wish they could come up with something similar for an hourglass block!!!