I run this on my Asus R7000 and it's the best firmware I've ever used on this (or any router) device. NAS, OpenVPN, Guest Wifi and even Transmission (Bittorrent Client) and nginx have been running stable for many years now, and the network speed can keep up with my 500Mbit line (I heard Gigabit might be a bit too much for that device).

So glad FreshTomato still keeps on getting regular updates and lets me use the now 7 years old R7000.