By carefully selecting only high-quality, maintained repos like BigBoss, Chariz, and Paisseon, and avoiding pirate sources, you ensure that your jailbroken device remains stable, fast, and secure. Sileo provides the engine, but the "extra quality" comes from your choice of fuel—the repositories.
Search for and install "Sileo Prep," which prepares your device for the transition. cydia installer repo sileo extra quality
How to add a high-quality repo (Cydia / Sileo) By carefully selecting only high-quality