Just a quick question, does anyone see an issue with someone using the demo cards in the "real" game.

As far as I can tell they all have the same rules and would help cut back costs if someone is only able to afford 1core box, so I have no issues, but wanted the communities thoughts.

you mean the 2 prebuilt decks that come in the core set?

if so then they are meant to be taken apart once you feel comfortable with the rules.

No sorry, my local store received 4 or 5 demo packs that have 30 ork and space marine cards, and have the words DEMO CARD printed across the front of them. my core set hasn't shown up yet so I don't know if these are the same as the prebuilts.

Technically they would not be legal.

throw them in some sleeves and i dont think anyone would have a problem

from what I have heard they are the prebuilt decks without the neutral cards?

I wouldn't have a problem unless it was a tournament.