ExpressionEngine true nested URI's with Switchee, URL Helper & GW Has Children

gistfile1.php

// The key here is to use {all_segments} & {last_segment_category_url_title} from Litzinger's URL Helper extension. 
// I fork'd it and added the {last_segment_category_url} to determine if the last segment is a cat or not.
// If {last_segment_category_url} is a category, it will parse and the case will run, if not, it defaults to single entry template
// {all_segments} variable is great b/c it's dynamically builds the rule, rather than a fixed variable="{seg_1}/{seg_2}/{seg_3}/{seg_4}"

// Controller Template.
{exp:switchee variable="{all_segments}" parse="inward"}

   {case value="products"}
      {embed="site/_product_cat" cat_seg="home"}
   {/case}

   {case value="{all_parent_segments}/{last_segment_category_url_title}"}
      {embed="site/_product_cat"}
   {/case}

   {case default="yes"}
      {embed="site/_product_entry"}
   {/case}

{/exp:switchee}

// _product_cat template:
{exp:switchee variable="{embed:cat_seg}" parse="inward"}
   {case value="home"}
      product home page
   {/case}

   {case default="yes"}
      {exp:gwcode_haschildren:check cat_id="{last_segment_category_id}"}

      {if gwcode_haschildren}
         category has child cats
      {if:else}
   	  show entries of last child cat
      {/if}

   {/case}
{/exp:switchee}