Formaldehyde gas plasma sterilization is effective for sterilization reels and sterilizing devices that are sensitive to heat and moisture, such as certain types of endoscopes, electronics, and plastics. However, it's important to note that formaldehyde can be hazardous to human health, and proper safety measures must be in place to protect workers and ensure that residual formaldehyde levels on the sterilized devices are within acceptable limits.