I also had issues with it - the wifi is super weak and slow. I added a netgear wireless router to it and it's a great combo. The Zoom is fine for wired connections, but horrible with wifi. Pretty sure you can probably disable the wifi if you want.
Not real sure. Did not keep it very long because the wireless signal was very weak. The desktop worked ok because it was hard wired in bit an iPad and smart phone did not work well unless in the same room as the modem.
According to their website, it is a compatible device. The best way to verify is to call their customer service line and have them confirm it. http://www.charter.net/support/internet/modems-routers-wireless-adapters/
