Had a couple of their routers and modems for a few years now. Quirky interface, and a lot of the features feel bolt-on rather than having a logically designed feature set, nevertheless they have been very reliable, and the newer ones (not based on DD-WRT, I believe) reboot VERY quickly, a bonus on a busy network (albeit home).
The only duff one was the Vigor 120 modem (issues much documented elsewhere).
First time I've been notified of a zero day, and was nice to be directly notified too.
Double the cost of regular home routers indeed, but has been well worth it.
(No I don't work for them, but I do appreciate their kit).