Context is key!
I've been working with the CM cards and one thing I've noticed is that context is key when doing readings.
For example (and I don't have my cards with me right now), there are about 3 or 4 cards that mean "fertility" in this deck (Mistletoe and Maypole immediately come to mind) but if you read the book, the Mistletoe card is actually a health indicator card, whereas the Maypole is more about new beginnings and life paths--not necessarily pregnancy, per se.
One thing I have to get used to is the "no negative" cards in this deck. It makes my intuition work harder if I have to discern something that isn't positive in a reading; I have to go by my feeling when looking at the cards (e.g., "this just doesn't feel right, this card here) LOL
I've also found that I get flashes and relate some of the cards to Tarot archetypes. For example, the Solar Wheel is--duh--The Sun, and woman in the chariot (with flying red hair--indicates difficulties through which one must persevere) reminds me of the Queen of Wands. Sulis could easily be the Queen of Swords.
Just my $.02.
T.