For many users, the "Complete Collection" by ElAmigos is preferred over the official client for a few specific reasons:
Through high-level compression, the installer size is often significantly smaller than the official ~30GB+ installation, making it easier to store and share. starcraft ii the complete collection elamigos
Because it is a standalone install, it is often easier to apply certain community-made mods or custom maps without interfering with official Blizzard files. Final Verdict For many users, the "Complete Collection" by ElAmigos