SMART Shipping Rates & Rules

I sell a lot of mixed weight and size goods, they can vary from 2g up to 2kg and range from large letters to to small or medium parcels.
This app has been my saviour! No more stacking of rates, instead I have a complex tiered system to fairly and accurately apply shipping rates to the UK, all 3 EU zones, and all World wide Zones. I would have struggled to set this up so cleanly myself. Excellent support and help at every stage of the process. I am both relieved and delighted,- thank you.