When selecting ARF (Almost-Ready-to-Fly) RC planes, buyers must focus on the Airframe Material, typically choosing between EPO foam (durable and easy to repair) or Balsa wood/Plywood (stiffer and better for high-performance scale models). Ensure the Wing Loading ratio is appropriate for the target skill level; lower wing loading is better for beginners. Additionally, verify the pre-installed hardware quality, such as the clevises, control horns, and motor mounts, as these are critical for flight safety and structural integrity.