Cool, welcome to the world of Battleground!
Kubla was a very solid show. There was a nice mix of existing players picking up new decks (split about evenly between, "I've got all the in-print decks, give me the Umenzi!" and "I've got 2-4 decks and want to pick up a few more,") and new players. The new players also seemed about evenly split between "What's this?" and "I've heard good things about Battleground, show me more."
The Terrain Packs and Scenario Books sold well, although of course decks were the main sales item.
It's too bad I didn't have a second person there (or a volunteer!) to do more active demos or win-the-game events, but on balance I think it was probably the right call for me to go alone so Darwin could keep working on High Elves and other assorted goodies.