Hi there.
I just in stalled the plugin, and found it a bit complex to navigate.
Here is what I would have wanted:
1) to automatically get to have every post I have to be a product. (instead of me needing to enter an ID to each post)
2) I am only selling downloadable products. I have no need for the shipping rates page. In the "shipping" page, I don't get the option of saying "no shipping needed".
I wasn't able to make the simple task of turning each of my posts into products. (If it was able to make all the post of a particular category a product, that would be even better)
Good luck on your work on th plugin,
Tal