Great experience if you want a gwent experience vs actual players. It's different than its witcher 3 counterpart due to the need to balance it for pvp, but if you played it in witcher 3 you'll have the basics down pretty quick. Also probably one of the most generous in terms of playing f2p. I'd recommend this to people regardless of whether or not they've played the witcher 3 version. If you like card games, you'll probably love gwent regardless of your understanding of witcher lore.