I haven't seen the Apollo range but we did some tests with a £50 Netgear Universal Wi-Fi adaptor yesterday and thats working great, decent frame rate and image quality, ptz control etc is flawless.
It is a credit card sized box (designed for Smart TVs & Blueray) with an ethernet port and short patch cable supplied. It can be powered via the supplied power unit, or via USB which is how we used it, our dvr usb port runs it no problem.
It simply plugs into the DVRs ethernet port and connects to the wi-fi network, if you have a Netgear router you can use its WPS button, for other routers it has to be configured using a laptop before deploying.
Col