Using a yeast starter will always improve your fermentation. This package is big enough to do a 500ml starter. For a very big beer buy 2 packages to make a 1L starter.
Yeast Starter - Light Dry Malt Extract
Use 2oz for a 500ml Starter
Use 4oz for a 500ml Starter
Yeast Starter - Light Dry Malt Extract
Use 2oz for a 500ml Starter
Use 4oz for a 500ml Starter