What are the common problems with Goodman AC units?

What are the common problems with Goodman AC units including GSX14 14 SEER single stage, GSXC16 16 SEER two-stage, and GSXC18 18 SEER variable speed include capacitor failure, refrigerant leaks, and coil issues similar to other brands but with some Goodman-specific patterns. First, capacitor failure after 5 years causing outdoor unit not starting and buzzing noise, capacitor provides start boost to compressor and fan motor, fails due to heat, costing 150 to 300 dollars installed, common to all brands but slightly more frequent in Goodman due to thinner capacitor specs. Second, refrigerant leak from evaporator coil due to formicary corrosion causing pinhole leaks after 5 to 8 years, causing low charge, poor cooling with temperature split less than 15 degrees instead of normal 18 to 22 degrees, and ice buildup on indoor coil, repair costs 600 to 1,200 dollars including coil replacement at 400 to 900 dollars plus recharge. Third, contactor failure after 7 years causing unit not turning on, costing 150 to 250 dollars. Fourth, dirty condenser coil blocked with dirt and leaves causing high head pressure that trips high pressure switch and reduces efficiency by 10 to 20 percent, fix by cleaning coil with hose monthly. Fifth, control board failure after 10 years at 300 to 600 dollars. Sixth, Goodman specific issue with thin gauge cabinets that can rust faster in coastal areas. Service rates around 10 to 13 percent indicate decent reliability, slightly higher than Trane at 8 to 10 percent but acceptable for price. Regular maintenance prevents most problems.