Finished watching the last (second) season of this the other night, although another one has been announced and there should be at least one more after that.
I commend it to the house. It is the lovechild of The Goonies and X-Files, as a sci-fi/horror series featuring kids cutting about the place on bikes and a mysterious gubmint facility up to who-knows-what on the outskirts of the small 1980's town it's set in.
Although the main characters in it are young teenagers (13 or so), the acting in it is absolutely first rate and they (and the adults, including Winona Ryder) have scooped up a vast collection of awards.
In addition to top-notch acting, it's well written and beautifully shot. The soundtrack is excellent, with an electronic score intentionally reminiscent of Tangerine Dream, Vangelis, etc, and numerous songs from the 80's interspersed throughout.
If you have Netflix, get it watched!