It gets you five decks that are already good to go, a playmat, and markers and counters
Trekking Shoes only allows you to see the top card of your deck
What attacks does Mega Lucario ex have
Weaknesses: Stage 2 setup needs support from Kirlia, Rare Candy , Grand Tree , search, and draw cards
Commonly played examples include Aristocrats where you sacrifice something like Reassembling Skeleton to a mana free sacrifice like Ashnod's Altar and then trigger the Zulaport Cutthroat to hit all foes as your win-con or hitting with Guttersnipe and similar triggers in a Spellslinger deck for your instant and sorcery casts
Drawing extra cards and circumventing mana costs are two hallmarks of powerful constructed cards, and while Yisan takes a little bit to get going, Im sure it will see some solid play at some point in the format