I've almost racked up 1000 hours by this point, and I don't regret a minute of it. Gwent is a card game, but it doesn't feel like your just duking it out with another player. You're not slowly ramping up your mana until you can deal the knockout punch. It's combat, where often you have to lose the battle to win the war. It tests your mettle for tactics and strategy. Once you've gotten an understanding of the cards, you will find that you can beat much better decks by reading their game plan and out-manovering them. Can't recommend it enough.