I used to use an older, more expensive version from FormLabs in my last company to print our (more accurate) version of Invisalign negatives, and we'd thermoform the aligners over the top of the cured resin (with a barrier).

The accuracy was great. They'd hold up. Printing took a while, but generally pretty solid as we scaled from in-house to full lab setup. They're great as resin printers go.