In the best case, both routers own domain then build on, so to get to the Internet, but the devices of the two domains not reach one another, in the worse case is nothing more and you do not even get to the Internet. It can then be hours before you finally persuaded the second router to act only as an access point, and not to distribute as a router address.
The little Edimax but asks at the beginning of the setup, whether it should be configured as a router or an access point. The rest is a no brainer. In less than 5 minutes, the setup is done and the Edimax run as an Access Point - perfect !!
Who his own time what is worth and who wants to use the router only as an access point, which is here to have his joy.