Paying $27 for the opportunity to stream video games from your gaming PC to your living room PC isn't bad, even if you don't use it that often.
You can grab the Steam Link in-store or online for $27. You don't even have to use it to stream games - you can stream your desktop in a pinch, which is handy if you would prefer to stream movies at a higher quality than what your TV's in-built apps would allow.
But most people have a pretty decent Steam catalogue, and with the Steam sales set to kick off real soon, having a Link around can be handy. Here's some advice for getting the most out of Valve's streaming box:
Use a wired connection, if you can. This will cut down on any input lag if you want to play faster paced games or anything that needs a high degree of precision. Slower paced games with the family, like Telltale's catalogue or Life is Strange, should be fine on wireless though.
Grab a spare USB hub. This'll come in handy so you can always have a mouse and keyboard plugged in (wired or wireless). Steam games can crash sometimes, and it helps to have a fallback.
Plugging a wireless Xbox adapater into the Steam Link works real well. If it's the older Windows 10 adapter, you can run up to 4 Xbox controllers off the one adapter. The latest models will support up to 8 controllers.