In the past I used a lot of different tools to keep my Floyds from dropping into the cavity when setting it up or restringing all at once.
I was hesitant if I needed such a gimmick, or if it was a real tool.
After a few setups the TremBlock is here to stay. If you position it right and have the right height of the Floyd, then you can nearly setup and intonate everything right before releasing it. It will just pull everything a little sharp, which can be fixed with the fintuners.
This reduces the hassle and back-and-forth of finetuning the springs even after changing string gauges! That alone is a huge timesaver and worth it for me.
Also it seems well built and obviously keeps the finish save, which is a requirement.