We used it on our past July trip, and it was great! A bit of advice though.....
1. Write down the card ID number on some paper and keep it in a safe place. If you loose the card, they can still with your #'s, bring up your photos and burn them to a CD.
2. You can have multipul cards burned to a CD. So if your group splits up, they can all have their own photopass cards and before you leave WDW, have them all burned to a single CD.