The one you bought is Motorola SB5101u DOCSIS2.0 for $24.
There is a Motorola SBG901 DOCSIS3.0 for $42OBO.
Im tempted to go for that one, to better time-proof myself, only thing holding me back is that the SBG901 is in China.
Thoughts?
It looks like the SBG901 is actually docsis 2.0, not 3.0, according to the ebay listing. I checked TWs leased page
http://www.timewarnercable.com/en/residential-home/support/topics/internet/lease-your-modem.html that shows which modems are docsis 2.0/3.0 and which are IPV6 compatible, and at this point most of the info was removed. I have a feeling someone is in the middle of updating it (hopefully).
I would rather spend $24 on a docsis 2.0 since I currently only have speeds that require docsis 2.0 and I would only spend more money on a modem that is both docsis 3.0 and IPV6 compatible and has good ratings. AFAIK, only the SB6141 fits the bill and the cheapest I can find it is $90. Until the prices of those (even used) goes down considerably, or until I switch to FIOS, I will use the one I got for $24 which works fine.
Also, I wouldnt use my WIfi through that device , Id use my own router, so you have to figure out how to disable the Wifi on your modem ,assuming the firmware that is ULed by TW doesnt prevent you from doing so. Then that requires another call to TW to get them to turn it off. Do they help you if its your modem. IDK, but I wouldnt be shocked if you hit a brick wall.