I'm bias since I loved the game from the get go. I will speak as a new player to the LCG format and who intends to stay a casual player. Gameplay mechanichs and quality of design/art are captivating and outstanding. People who love to be surrounded by choices, strategy and planning will adore it. Unfortunately, you will need to buy 3 of the core sets to be fully immersed in the game, I'd say 1 core set would give you a mild learning experience to the ones curious enough, some of the clans work better than others with only one copy of each card + the filler neutral cards available IMO, hence the eventual necessity to have 3 core sets. Fortunately, you will have a lot to uncover and experiment around the diversity of the 7 clans from the base game, rendering a great amount of play time and replayability if you happen to have a partner who also enjoys casual play. As I discovered from most FFG LCG, you can never get tired of it with expansions blooming throughout the year, deckbuilding will add even more to this experience. As a casual player you may choose to either buy them right away or take your time, as will be my choice.