I've heard issues about DOA devices and ones that die after a few months - I've only had it running for about a week now and there have been no issues.
Setup was fairly painless and should be easy to follow for those not familiar or perhaps comfortable with trying to configure a router
Purchased 12/29/15, died 8/22/17; No power; Came home today and the internet was having issues with verifying security certificates; I power cycled the modem and router, but power never came back on for the router; I tried plugging it into several different outlets, but to no avail.