The price-tag on those used to be somewhat greater: I can't remember if I paid $150 or more. But -- yeah -- that's the one I use, and it's been in service for three or four years.
You can either connect it directly to an RJ-45 LAN port of your computer, or to a switch or router on your network. If the former, search the Silly-dust web-site for the instructions.
If your IS or AV software separates software into "Trusted," "Restricted" or "Untrusted," check to assure that none of the Silly-dust driver programs are "Limited" or "Restricted." They should be "Trusted."
I'm assuming you have a cable-TV subscription, or cable-TV bundled with your internet -- but the bundling doesn't matter. You would need to go to the service-desk of your cable-provider and obtain a cable-card -- figured into your cable subscription bill. For my Charter subscription, the cablecard only adds $2/month, and every subsequent cablecard costs $2/month. [Some providers charge more, and some folks here have expressed their irritation at the practice.] The cable-card should come with a "tuner-adapter" -- much the same shape, color and appearance as the HDHomeRun Prime. You'll need a 3' coax patch cable, a 3' (more like 6' available) USB cable, and an Ethernet cable long enough to reach your switch or router. The coax from your wall connects to the tuner adapter; the tuner adapter connects to the HomeRun Prime with the USB and a coax patch.