CPC_Andrew - 3:04 pm on Sep 14, 2011 (gmt 0)
Make sure you're including a Google Product Category along with your product_type category.
And make sure you're adhering to these new guidelines:
Google is supposedly going to start warning then banning accounts who aren't following them.
Also something to keep in mind is that since Google Product Search is free, the ability for competition to push you out of a portion of your market there is higher than on other channels.
If you guys want to post any errors in your merchant centers I'll be happy to work through them with you. ohno I sent you a sticky.