Buyers should focus on thickness and hardware quality. Standard HPL boards are typically 12mm or 18mm thick; increasing thickness will raise the price but improve structural stability. Furthermore, the hardware kit (hinges, support legs, locks, and corner brackets) can be made of Nylon, Aluminum Alloy, or 304 Stainless Steel. We recommend 304 Stainless Steel hardware for long-term cost-efficiency, as it prevents rust in humid bathroom environments, reducing maintenance and replacement costs over a 5-10 year lifecycle.