the hh5 is decent for a isp supplied router, but its firmware is pretty featureless.
Ironically when I switched back to my asus rt-n16 the wireless on it went haywire and I couldnt connect the f1 app on phone during a race, replugged in my hh5 (as access point not router) and the wireless on that was working fine.
So now I have the hh5 as my wireless access point but using asus as router. Since I am using tomota based firmware, if I fiddle with the wireless settings on it it drops the pppoe connection which I dont want currently and the hh5 has 5ghz as well as a bonus.
Of course your n66u is dual band.
BT Infinity 2 Since Dec 2012 - BQM