Hi
Talk about expensive, for that money you can get some better and decent kit elsewhere, and given no one will have any devices capable of taking advantage of the "Wi-Fi" marketing speeds, it seems just to be a "Mine is bigger than yours" boys toy :-)
Netgears build quality of VDSL/ADSL routers isn't good either, the D7000 was poor and very cheaply made compared to the router version, despite being more expensive, presumably because they sell less overall than the router version.
Tri-band, where I assume it has essentially 2 x 5GHz Wi-Fi access points doesn't provide much advantage as the range is much less plus you would need a very large number of heavily active devices quite close to it to warrant any advantage of two, and I suspect if you had enough devices all talking to each other to make some use of the two 5GHz Wi-Fi points, they would not be able to saturate the total bandwidth anyway due to bottlenecks within the router.
You need to separate out the 2 x 5GHz Wi-Fi points into two different areas of the home to get an advantage, and a lot of people have done this already for much cheaper using two or more Wi-Fi APs.
Netgear like to sell the emperors new clothes.
Regards
Phil