Chief executive Andrew Hancock said the £500,000 refit had made depots easier to navigate by displaying stock by occasion, rather than by brand.
He added that the new layout mirrored the retail environment products would end up in.
The biggest impact has been on secondary brands, now easier to find as they are stocked alongside big brands.
By stocking products aimed at children in one place, the new merchandising created the impression ranges had been increased, added Hancock.
Manned customer service points have been created at every store, where customers can pick up market information such as lists of top-selling products.
Hancock is now conducting research to find expansion opportunities for the family-owned business, with a number of sites being explored.