I never played Witcher 3 but I decided to give gwent a try simply because i loved Witcher 1 and 2. 600+ hours later, this is definitely one of my favourite games of all time. The economy is incredibly generous, so much so that I actually felt bad and decided to buy stuff simply to support it. What you get from the game depends on how you want to play: you can use crazy decks to have fun, go hardcore and play hours and hours to learn the current top strategies, or go with the pro ladder. The one downside I would say is that the game lacked an identify for a long time and had to go through some major overhauls to find one. The game has been recently overhauled completely and this alienated some players. If you have never played before, this is absolutely a great time to jump in and learn the new gwent. I loved the old gwent, and I am loving this new gwent. The joy is still there and I recommend to anyone to pick this game up and give it a try.