This past weekend, I migrated a company from QuickBooks to Financials. I ran into all sorts of unnecessary issues that at least doubled the time for doing this.
As an example, your "RapidStart" doesn't import quantities for inventory items. O.K., so I figured I would enter inventory items through RapidStart, and then use the "Export to Excel" function from with the "Financials | Item List" to export the items, enter the quantities, an then publish the updates back to Financials.
Unfortunately, quantities aren't updatable when I try to "publish" the Excel spreadsheet back to Financials. Consequently, I had to step through the item screen (one item at a time) in order to add the quantities on hand.
Were your ears ringing? If not, they should have been... You allow inventory adjustments from the Item card, why not allow them through "RapidStart", "Export to Excel", or both?
By not allowing us to do this en masse', you nearly made this task impossible to complete over a weekend.