Hi,
As I stated before, it will depend on your DEVICE i.e. Smartphone, Tablet, Laptop whether it allows you to SAVE the SSID as a "TRUST" SSID.
Once the device stores the SSID and password, it will work and has nothing to do with the AP.
If the device can't store the SSID as a "trusted network", you will be required to enter the credentials regardless whether the SSID is hidden or not.
The DEVICE is the key here.