Simultaneous option behavior is actually a problematic feature.When a customer visits a product page, option select-boxes have always the first option in the list already selected by default. So a customer can easily order a wrong product if the client just hit the buy button.
Many have tried to add an"please select option" but this will be treated as a product option, and again one can order the product with this option selected. Also, Sequential options is not the solution for this case.
So we created the fix for Simultaneous Options Addon. This one will make SImultaneous Options work as they should from the start:
1) When a customer opens a product page with ‘Simultaneous’ options, select-boxes say "Please Select" instead of having the first option in each list already selected by default.
2) 'Required' ‘Simultaneous’ options function as expected. If a customer clicks 'Add to cart', the item will not be added to the cart without selecting a valid value for each required option. If they haven't changed every required option from "Please Select", the product cannot be added to the cart, and a warning is given.
Works with both Select box and Radio Button Type.
For this Add-on to work properly, product options must always be set to "Required".
Easy to install through Addon Managment. Compatible with versions 4.5.x and up