A brilliant router! I replaced a BT series 2 router (Total broadband) because the WIFI range on that seemed so limited, not a problem with the Billion, house, garden, even 100 mtrs down the road you can get logged on. Performance speed wise seems great - on checks at different times of the day and night for a week after installing, 5 different broadband speed check sites gave at least a meg plus improvement to the D/L speed compared to the BT one. I know that's not really very scientific and it could be the luck of the draw, recent improvement to the street furniture etc...but.
Basically it's a (white) box some 9" x 6" x 2" with three external aerials each some 4 inches in height. These are Omni directional (but I guess most folks will have them upright. With the aerials in place the total length of the box becomes 12" and height about 5". The Billion has a separate power unit (small standard mobile phone type) which has a short power lead of no more than 28" or so. It has its own on/off switch and a separate socket for the DSL (telephone) connection. The rear also has a socket for EWAN and four Ethernet sockets. It has a built in firewall. It comes with a small instruction booklet which is enough to get one up and running and a more detailed manual on a CD.
I have tested it's security against the various web sites that cover that aspect and it rates A plus on all, can't be seen etc. Downside and I toyed with only giving four stars here, the many and varied possible security settings can get a little complicated if you are a novice in that area. Took me a good while tweaking et al to get things just right. Something to bear in mind is that while it works straight out of the box you may have to put in some effort to get the max out of the machine, overall it's probably a little overkill for most households.
UPDATE : 12-07-2011
I have seen on various sites that this modem can be used in place of the BT Home Hub 3 if you have BT Infinity. I'm sure that is correct, but it is neither straightforward nor always possible. Despite spending a lot of time and effort, changing all parameters as per instructions etc., I have not been able to get this router to work with Infinity. I mention this as, while I am well aware that the failure may well be down to me, folks should be aware of the possibility of failure if they try to replace the HH3 with this router (which I would dearly love to do as BT have seen fit to leave port 161 open!)
UPDATE : 14-09-2011
I finally gave up trying to get this to work with Infinity and have bought an Apple Airport Extreme. This worked almost straight out of the box with Infinity with only a little 'tweaking' required. However, while the Airport is very good, it just isn't as good as this Billion, firstly the Billon gives many more 'tweaking' options and secondly, the WiFi range of the Billon is superior to the Airport extreme.
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