The set didn't actually come with 6 cards - it came with a mail in coupon for 6 cards but to get it, you have to send in the original upc, the original receipt and send back one of the posters that the set comes with. OH! ...and that coupon expired in October 2012! My son was happy with the rest of the set but really disappointed that it didn't actually have playing cards which are needed to play the game.
My 9 year old son BEGGED me to buy this for him, so we gave it to him on Easter. He's pretty savvy with toys and generally doesn't need instructions with how to play with it, but he can't even figure it out WITH instructions! He played with the Monsuno toys on Easter day and that was it. I'm disappointed that we wasted the money on this when we could've gotten him more Beyblades.