When evaluating machines, prioritize the production capacity, typically ranging from 2,500 to 4,000 pieces per hour for single-die models. Ensure the machine supports variable mold sizes (4 to 12 inches) to cater to different market demands. Check the motor power (usually 1-2 HP) and ensure it features an automatic oiling system to reduce mechanical wear. For high-end production, look for PLC-controlled systems that allow for precise pressure and temperature adjustments, ensuring consistent product depth and edge finishing.