I've been using the Quill system for about 8 months now, I'm pretty sure I'm the first customer in Canada!
We used to use the Raster system for years, and while it works, its slow and labour intensive, we always found that you would need to drill the holes twice, because if any little spec of drilled material got under the engraver nose cone, the hole wouldn't be the correct depth, and all it takes is 1 bead not fitting properly to make the whole sign garbage. Our other issue with the raster system is that my staff HATED inserting the beads, they complained that their wrists and forearms would hurt after a few hours, as a result, braille jobs would sit for far too long until either I did the braille, or forced my staff to do it.
With the quill system, the machine drops a small bead of UV gel resin, which you hit with a UV flashlight for 3 seconds to cure, once it's cured it sticks like crazy to acrylic. and if there is a mistake, just wipe the dots off before you cure them and try again. We had an order for 300 stairwell signs to do about 2 months ago, each sign had "Stairwell X Level X" in braille, with the raster system it would take about 3 days to drill and insert the beads, plus I would need to hear about everyone's aches and pains, with the quill, we were able to complete the braille in just over 1 day.
There have been a few small hiccups along the way, but Jack, the owner has been extremely responsive, he gave me his Cell number and picks up every time I call, he also makes sure if there are issues that cause me to not get full yield out of the resin cartridges, I get replacement ones shipped out.
The quill system has increased our braille production 5x-10x, I can't imagine ever going back to the raster method at this point.