The Steam Link and Steam Controller are both on sale this weekend for $35. I think the Link is a pretty good product, especially at this price. It allowed me to keep my PC at a desk for games that are better in that setting and still allowed me to play other games in the living room with a controller.
It has worked really well for me even though I find myself wanting to play most games on my higher resolution 1440p monitor. I still use it from time to time though and it's cheap enough that I'm happy with my purchase. I haven't had any problems with latency either but I'm running it on a wired network. People using WiFi may have more issues.
http://store.steampowered.com/app/353370/