I bought some basics- 5 inch squares 2.5 inch squares, 2.5 inch strips, and a couple of sets like Hunter's Star and Drunkard's path.
I've gotten better deals on Ebay for these. The Accuquilt website is not very user friendly and the prices are higher. I only buy there when there is a sale with free ship.
I hope you enjoy your cutter. I love mine!
PS. I haven't bought any cubes- way too pricey!