Matrixify

If I could give this app 10+ stars I would! There are other apps which aid in a migration, which is what I used this for, but the other apps aren't very mature in terms of being able to capture ALL the data. The other problem is that the data has to sit somewhere while being migrated (on other apps). If you just export (on the old store) to all the defaults and import (to the new store) using this app on both stores, you'll see it does an INCREDIBLE job! I was extremely impressed.. you can export metafields and weird data chunks that you wouldn't think you needed - but you do - when migrating. A must-have App for that activity. It's also useful as a backup too - I see other backup systems out there, but this one would work great to keep a copy of your data locally should something bump into your store.