After spending some time with my new DIR-655, I have come to the conclusion that it is a solid and good piece of hardware. The software for it however has some areas that could be improved upon.
One of those areas is wireless Guest access - allow us the ability to throttle guest bandwidth use (up and down streams) so that we can have this option on and not have it affect either our network performance, or broadband limitations.
I for one would gladly provide a neighborhood wireless network, to be used either as a backup when someone's goes down, or when a guest is in the area and cannot find an open network. But I can't have them adversely impacting my primary WAN connection, and right now if I left guest wireless on 24/7 they could.
Even something as simple as a checkbox and two linked dropdown lists that allow you to pick kbps/KBps to throttle them to.