Well, it is just great. I would love if it could provide more options like automatic sorting by alphabetic order in wanted list and also custom sorting in said wanted list like more than 100 items per pages which is manually doable via the address bar and by items and color as bricklink don't allow to save a custom sorting order.
At least but not last - check the checkbox for "Hide Items if Have Qty is ≥ Want Qty" ...

That could be great.