It is the only way to play complex .GIG libraries exactly as they were engineered.
The phrase "Tascam GigaStudio 3 by drpatje better" appears to refer to a specific software repackaging or optimization effort by a community member known as "drpatje." Based on community archives, this version is generally considered "better" because it addresses the modern compatibility hurdles that made the original Tascam release nearly impossible to use on contemporary hardware. Overview of GigaStudio 3 tascam gigastudio 3 by drpatje better