I had never heard of one. I use a Pacific 366 and thought it is a hefty machine but that one is built like a brick sh!7 house. Too bad they didn't continue. Looks as if they would have made a primer feed and other advancements it would have been the machine to have.
The downside to these loaders is the lack of a primer feed and no escape holes for spilled shot. If you have a spill, you will need to remove the shell plate to clear. Also, the resizing die is a spring loaded affair that is supposed to eject the shell by spring pressure. I found that cases tend to stick in the die, especially steel head cases. The Pacific DL350 (but not the DL360) and later loaders are far superior in my opinion.