I bought this a  few weeks ago. I had returned a previous. Same issues. 
Use with S30.  Useless to blend as it leaks to the  blender base whatever you do. 
You can't get a full cup blend, even if you start with full cup. 
The lid is a struggle  to remove.
Double walled with 'ridges' inside, do you have to be careful to clean around the rides inside I'm case of food being stick.
The base is tapering narrow so difficult to reach down to clean.

All in all, bad design.I now only use the S30 jug assembly to  blend , and transfer to another  container  if I need portability rather than  this .