I've used OOO before. As far as I can tell their flavors aren't just repackaged.
They shipped quickly. Their prices were reasonable, and every time I used them (3 times I think) they would include free flavor samples. Granted the samples weren't their most popular, I think the last one they sent was pretzel (??), I never tried it so, who knows.
But all in all I don't have anything bad to say about them.