Bought this to complement a Apple 1TB Time Capsule Dual-Band
WiFi router and replace the DSL WiFi router that comes with O2 subscription. It is very easy to set up and there was a quick guide on draytek's website specifically for O2 DSL subscribers with all the recommended settings.
The connexion works well, is extremely stable, and the download speed is around 20% higher than before - not too sure why that would be, and I was not expecting any significant difference, so it's a good surprise.
Just to be clear - this is a very good wired DSL modem, and nothing more. You will need a router to share the connexion. Which is fine if you already have a wifi router or really want to have dual band WiFi and a DSL connection (when I purchased mine, there was no 5GHz n DSL router, and I don't think there is as of Apr 10).