This extension is very handy to set the product price as the price of an option price (added to the product).
You can set the Product Base Price as any Option's Price for every product.
This is very useful for the stores where no need for any Base Price, but price must change as option changes.
You have to manually select the option value to set its price as product base price. The selected price of the option will be displayed everywhere including product page. Any special price / discount added to the product is removed.
Price update is an added feature with this extension, to change the price at product page as option changes.