I have a few printed parts on the Jeep, but I mostly use the printer to prototype. I typically print in PETG and have had relatively good luck with the parts holding up. I think right now I have a couple of brackets on my fuse box under the hood that have been there for 6 months or so and haven't deformed yet. I also have a shift knob, switch plate brackets, speaker grills, sensor mounts, pull handle for the tumble seat, cell phone mount as well as others I'm sure I have forgotten. I have prototypes for the shifter I made for the 3550, fuel pump hanger, overhead switch panel, cb mount bar, defrost grille, throttle body, also many brackets. I can print them out cheap, check fitment and such, then decide whether to make a part or not. That has been the most useful for me.