Using a smash burger press helps apply even, consistent pressure across the burger patty, which creates a better sear and more uniform shape. One reviewer notes that it “allows you to create perfect, flattened burger patties with precision and ease.” The flattened surface also enhances the Maillard reaction (browning of the meat’s surface) for improved flavour and texture.

Yes — stainless steel offers several practical benefits: it’s rust‑resistant, easy to clean, and low‑maintenance. For example, one article notes that stainless‑steel presses “do not require nearly as much special treatment as cast iron” and can be dishwasher safe. On the other hand, stainless doesn’t retain heat as long as cast iron, so you might not get quite the same heat‑hold for searing—but for many home cooks the tradeoff is worth it.

Here are a few care tips:

• Before first use and between uses, pre‑heat the press a little or oil the flat surface to reduce sticking.
  
• Clean after use: stainless steel models are generally easier to clean and some are dishwasher safe.
  
• Avoid abrupt temperature shock or dropping the tool which could damage it or affect its finish.
  
• Store in a dry place to avoid moisture build‑up (even though stainless steel resists rust better than cast iron, good practice still applies).

The diameter of the pressing plate typically dictates the size of the burger. Many producers supply sizes around 14 cm (≈5.5‑6 inches) for everyday burgers at home.