Yep, the Discord is super active and there's plenty of people to help you out if you hit any snags. But the hardware is super easy to install and ready to go if you have a compatible car. There's also a lot of active Youtubers like ku7 (https://www.youtube.com/channel/UCXmUBvIuFLjLRuJ0mX298Ng) and arne (https://www.youtube.com/user/arneschwarck) that are building their own forks.
Such as what? Autopilot is completely vision/radar based as well. Sure it has a few more cameras for a greater margin of safety, but its' effective capabilities are the exact same. It's still completely reliant on tracking lane lines, the user has to disengage at stop lights, and it can't make 90 degree city street turns. The only real difference I can see is automatic lane switching, which is available in some Openpilot forks.
It's mind-blowingly good. Easily on par with Autopilot (That is, Autopilot's ACTUAL capabilities, not what they show in marketing promos). For long highway trips, it's easy to go hours without a disengagement.
The full setup costs about $800, is completely plug-and-play, and you can order everything you need on the site (EON/Panda/Giraffe). See: https://www.youtube.com/watch?v=UfF9l2-orTk
There's a huge active community working on adding support for more cars and even custom forks with more advanced features like dynamic follow. Someone even recently got a VW bus working with it. https://discordapp.com/invite/avCJxEX
Also it's just really freaking cool to have a self driving Corolla. Can't stress how much this thing has changed the way I view driving and going places. It's no longer a pain, but a joy to sit in stop and go traffic. It's not perfect, but it's pushing the border of level 3 autonomy and far better than anything that any manufacturer besides Tesla is shipping.