Asus RT N56U received rave reviews when it was launched and almost universally touted as the best N band wireless router for advance home users. It offered 2 usb ports, dual band frequency (2.4 Ghz and 5 Ghz) and beat many other competitors on different test parameters such as signal quality and speed. I bought it going through all the reviews and finer details (not worth mentioning here) but after 6-7 months of use I can say it is a big disappointment.
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The biggest annoyance is the frequent drop of connection. The moment I connect 6-7 devices, I get frequent losses of connection. And, the only cure is to restart the router. This router, though has two usb ports for sharing devices over home network, is difficult to configure for most of the devices apart from the usb storage drives and the speed is not unto the mark. I tried streaming media to xbox and television, but the experience was not good.

I also committed a mistake while looking at the specification and I had no idea that it does not support DD-WRT firmware. Moreover, the only reason I bought this, ignoring Airport Extreme or Airport Express was I thought it supports VPN client login. It does not. It has VPN server capabilities but it does not have inbuilt client login to VPN. So anyone who is looking forward to use this router to take all the devices online through a VPN, would be disappointed. However, it does support VPN if you have VPN client configured on each of the individual devices. But that is not the point. I wanted to use my XBOX to connect to US store for streaming movies over Netflix, but this was not possible as XBOX does not support any built in VPN capabilities.

I also experienced even more problematic connection (super slow speed and frequent connection drop) if I start my torrent client. Evidently, this is not a good router for anyone with moderate use of torrent clients.

Out of the two bands, 5 Ghz does not even show in all corners of my house (it is a small house and I do not think it should require two routers to cover all the corners). The list goes on..

I am stuck with this so I tried all the tweaking in the settings, upgrade to numerous official software version but things did not work to my expectations. However, I used a third-party firmware (http://code.google.com/p/rt-n56u/) to upgrade the router firmware and things have changed for a bit better. At least the frequent drop in connection is not there and I can stream my media at a decent speed.