I like it in Jeskai or an aggressive Temur deck, and havent been as impressed in Sultai control
Yes, Lorcana features various card types including Characters, Songs, Items, Actions, and the newly introduced Location cards
Several helpful YouTube videos also break down turn phases even further
She causes every critter your opponent casts and every nonbasic land they play to enter tapped, totally nullifying haste as a keyword and slowing their mana production considerably (unless your opponents prefer to play with the Thriving lands)
Some collectors shop on TCGPlayer as well but a lot of the market price on most cards is determined by the need for that card for the players
They are all strong causal cards in addition to being tournament playable