Hi,

1, We can not test all of the extension, but we have developed based on the standard structure of magento, and I believe that our product will be compatible with the module that developed properly structure of magento. Also after months of sales, we have not received any feedback about incompatibility with other modules.
If you have any incompatibility with other modules. we will check and give you best solution.

2, each module will provide other method to access, this depend module that you install.

Best regards!
Leek

Hi,

You have the license for unlimited domain?

Thanks