Is PETG harder to print than PLA?

Yes, somewhat. It needs a hotter nozzle and a heated bed, slower speeds and more retraction tuning to control stringing. Once dialed in it prints reliably.

What temperatures should I use?

Most PETG prints around 230-250°C at the nozzle with a bed near 70-85°C. Start in the middle and adjust for your printer and part.

Does it work on a printer without a heated bed?

Not well. PETG needs a heated bed for good first-layer adhesion. A printer without one is better suited to PLA.

How does it compare with ABS?

PETG is easier to print, warps less and has little odor, but ABS handles higher heat. For most home functional parts PETG is the simpler choice.

Does the filament need drying?

PETG absorbs moisture from the air, which causes popping and rough prints. Dry the spool if prints turn bubbly, and store it sealed with desiccant.

Parts that need impact resistance and slight flex: brackets, mounts, tool holders, containers and replacement knobs. It is less suited to high-heat or fine-detail cosmetic pieces.