Stainless steel swords can be good depending on the specific requirements and intended use. Stainless steel is a type of steel that contains a minimum of 10.5% chromium, which creates a protective layer of chromium oxide on the surface of the metal, providing it with corrosion resistance.

Here are some considerations regarding stainless steel swords:

1. Corrosion resistance: One of the primary advantages of stainless steel swords is their resistance to rust and corrosion. This makes them suitable for environments with high humidity or exposure to moisture, where maintenance and care of the sword may be more challenging. Stainless steel swords are less prone to staining or developing rust spots compared to non-stainless steel blades.
2. Ease of maintenance: Stainless steel swords are generally easier to maintain than non-stainless steel blades. The corrosion-resistant nature of stainless steel reduces the need for frequent cleaning, oiling, and maintenance to prevent rust.
3. Blade performance: The performance of a stainless steel sword depends on the specific grade and heat treatment of the stainless steel used. Stainless steels can vary significantly in their mechanical properties, including hardness, toughness, and edge retention. Some stainless steels may not have the same level of hardness and edge retention as non-stainless steels commonly used for swords. However, there are stainless steel alloys specifically designed for high-performance blades that can offer satisfactory cutting ability and durability.
4. Flexibility: Stainless steel swords tend to be more flexible than non-stainless steel swords. This can be advantageous in terms of absorbing impact and reducing the risk of breakage. However, excessive flexibility can lead to reduced cutting ability or a less defined edge.

It's important to note that the term "stainless steel" encompasses a wide range of steel alloys with varying compositions and properties. Not all stainless steels are equally suited for sword-making, and some grades may not meet the requirements of high-performance swords. The specific grade and heat treatment of the stainless steel will significantly influence the quality and performance of the sword.

Ultimately, the suitability of a stainless steel sword depends on the specific application, intended use, and personal preferences. For collectors, decorative pieces, or situations where corrosion resistance is particularly important, stainless steel swords can be a good choice. However, for those seeking optimal cutting performance or traditional sword-making characteristics, non-stainless steels may be preferred.