SIM is handy for identifying new items and getting the basic data together but we have to run multiple wizards after SIM import to fix the problems:
1/ Wizard to fix Descriptions and Barcode Descriptions
2/ Wizard to fix Supplier Cost Prices
3/ Wizard to fix Avg Cost Prices
4/ Wizard to sort any brand discounts we have in place.
5/ Manually fix Matrix issues...
Solution
From the basket have an option to:
Export to Import Template
We can then tweak all the data we need to, especially descriptions and matrices for a clean manual import.