Multi SSID is useful if you have allow access of wireless to friends and external parties. If you're on 1 SSID and they're on another SSID, they would not have access to your computers. Right now, with only 1 SSID, everyone that are allowed access to my wireless can access my computer and shared files that was meant for my private network.

Anyway, right now, I have no regret getting N16 anymore coz started to use its inbuilt bittorrent features with a WD Passport 500GB external hard disk. N15U does not have inbuilt torrent. These feature is a godsend for torrenting coz I just plug in my USB hard disk, install inbuilt torrent from within router and started torrenting. Switch off my PC and leave the router and its attached hd on. Minimize lots of heat, power that resulted to having the PC switch for torrenting.

I love the default QoS. Will limit torrent to 512K upload and download automatically and allow any surfing, gaming to go smoothly as usual. Will switch off QoS at midnight to allow maximum torrenting bandwidth without surfing.

The auto off and on wireless feature in its professional wireless setting is extremely useful for me coz my router is located in my bedroom. Since usually used wired network, will auto off wireless signal at 10:30 night and auto on at 9am the next day.

Conclusion, I've read many mediocre review of N16 (those not using tomato, 3rd party firmware). Turned out those reviews are mostly dated and irrelevant anymore with the release of newly re-vamped Asus firmware version 3 onwards. Early cons of unstable firmware, not so great torrenting feature, possible overheat, weak signal, insufficient power for USB powered are all reversed using the latest Asus firmware.

Revamped bittorrent feature is still basic but good and simple enuf to use, firmware is now quite stable, performance has been enhanced, overheat is no longer an issue as there heatsink now on chip versus early reviewed version, signal is commendable and works great with auto on/off feature and my 500GB and 1TB usb powered WD Passport works without any problem for torrenting. So all is good now. Only thing missing is the 5Ghz band but will need to fork out extra RM120 for N56U for that, since I don't use wireless that much, I can live with only 2.4GHz for now.

N15U is with multi SSID is still great and abt RM80 cheaper with cool design BUT it has no inbuilt torrenting feature that I find extremely useful now since I started torrenting.