I already said that I'm worried about security because at the Croatian support page, "Security Patch Firmware" 1.11B01 (dated 11/09/16) is still missing. From the other side, I have to admit that all this time my D-Link DIR-890L functioned very ok using 1.09b14 and later 1.10 firmware (all default settings): 1 desktop PC (wired), 2 laptops (wireless) and 2 smartphones (wireless).
Circa 30 days I have a guest in my home with one Apple iPhone smartphone (wireless) and one Apple tablet iPad (wireless). Last 30 days I'm experiencing few times a day slowing/dropping of Internet connection - consequently, every time it happens I have to restart my D-Link DIR-890L.