I know its my second review, but I just want to commend CTO - I asked for a modification to the integration to better match up charges, and they did it in just a few days. Very responsive and helpful!
This is working great! Installed in seconds, very few settings, and invoices ended up right in Xero - Love it!
Would be nice if it could do some inventory management from Xero to Shopify, but I'll take the fact that its tracking the inventory down to Xero.