We use the Simmental expansion every game. The way the card holders are designed is such that there is a slot for all the Simmental cards (2, 4, and 5) with sleeves as well as a separate slot for the rest of the cattle cards with sleeves. Those work well. However, because we use the Simmental expansion every game, we like to put it away with the 2 strength Simmentals in the market deck, ready to go for next game. This causes the market deck to be too tall for its holder and things don't pack quite right. Small issue only. Otherwise it really helps set up and is lovely to have.