I used this to replace a TalkTalk WiFi Modem the Cabled Part of the connection works very well and the Auto Set up is very easy. It come's with many presets for most u.k. ISP providers, It was up and running in a few minutes.
I found at first that the WiFi was a bit dodgy with a lot of severe slow down's in speed. I managed fairly easily to change the channel it work's on, from the default number 1 this greatly improved the performance. If like me you have a large number of competing WiFi devices in your area, you really need to got some software working, and find out what channel they are all working on, and change your device to a free channel there are 13 to choose from. Make sure that the firmware is at least V1-10723. (mine was much older)
I emailed tech support, and 1 week later have not got a reply.