i have it. this system can be a bit tricky to make thin lower anteriors, but generally it is an OK system to use; worthy to note: setting the bur at the correct height can be a bit tricky, so try not to break it by drilling through the metal center disks.
the plastic plates can get expensive after a while, so i hope you plan on printing your own or otherwise having a ready source available.
the silicone putty they have is amazing stuff. its worth it to just buy a few tubs of it for general purpose.
keep a toothbrush handy for cleaning the models, they will get very dusty and if any dust gets in the pins, the dies won't seat right and you'll have a mess on your hands.
the pins they give you are completely round, so you are forced to use two per die, which as i said earlier can make life tricky on lower anterior cases.
you'll need a pretty powerful vibration table too as the pourable monstrosities you get with this system are pretty heavy.
overall its the same amount of work as pindexing, just no glue involved (unless the worst happens)