Addicting yes, BUT... it takes more tokens to play than you win, as you get closer to completing a book the gem rewards get smaller. You can have 1 card on the table and 9 in the deck and still not get the card you need to play. The more coins and rewards you have, the more it takes you to win. You may hit the big jackpot on the wheel once in the year and a f you've been playing. It is rigged for you not to win large challenge payouts. Expect nothing, you won't be disappointed.