Just noticed this today. It's good to have the option there for those who want it. The HG659 is provided by Spark and Vodafone also and actually seems like a decent modem, it works for all plans and is available to new customers for $99.
My Archer C2 is doing okay, im not sure if the wifi would be better with this one.
If you're not on Big pipe yet, and are thinking of signing up, if you use my link you get $20 credit