I've got one, there's not much to say about it, it gives you some stats on your connection and you get an email every month showing how your broadband has behaved.
Last 24h
Last 30 days
There's been a utilisation issue on my segment, it looks like they may have done work as the speed has definitely gone up (although now I don't see TTL expired packets...but that's another story).
I'm on a Business 500 service with 13 static IP's.