If anyone is interested, here is my experience with Comma AI / OpenPilot and the Honda Clarity.
My car is a 2018 Honda Clarity. The equipment I am using is an official EON and a grey Panda, as well as a custom harness adapter (guys on the discord channel can make them for around $35 to $40, it took 3 weeks to receive mine. Quality was excellent).
To install, I simply removed the camera cover (push the cover up towards the headliner, then pry down from the top to pop off the clips, clips in bottom may break if you try to pry from the bottom). Remove the 1 wire harness going into the camera and plug it into the custom harness that adapter sit to an ODB2 port. Plug the OBD2 end into the grey panda, and then plug the USB from the panda into the EON.
This next part is a bit technical, so if your not comfortable with technology, find a child or a relative that works in IT and they may be able to help you

. Flash open pilot into the EON if its still running on the free dashcam software it comes prepackaged with, then ssh into the unit and install the latest channel for the clarity onto the unit (as of right now, im using kegmans .70 branch for clarity). After you successfully install kegmans branch into the unit, perform a manual flash of the Panda unit (note: car must be off and everything plugged in, EON powered on for this to work). After the flash completes, reboot the unit and your ready to go. Took me about 20 minutes to complete (I am a IT guy for a living so i knew my way around a little better).
My experience, the Open Pilot has been a huge upgrade over the stock system. I no longer need to grab the steering wheel to let the system know im paying attention, and it follows lines on the road significantly better. Also, it can follow a road even if only 1 line is visual which is a LOT of roads in my area. Its also very good at assumign routes when there is a break in the road paint (such as intersections) and even was able to trace a route for my driveway (no paint at all, it just did its best to follow the pavement! I did not expect this.) It works at pretty much ANY speed so no need to go above 40 to have the car drive! Also, the car will automatically resume after coming to a stop behind traffic regardless of how long it sits there. It is able to apply a bit more of a turn than the stock system, but im hoping future updates they figure out how to smooth this out and override the small power limit of the honda steering. Also, with .7, we now have auto lane change which im happy to report works amazingly. The car is not equipped with all around sensors to see other cars but all I need to do is peek in the mirror to make sure its clear than hit the directional. The car does the rest.
I did a drive from Newport RI to Dennis Ma down in cape cod (about 70 miles) and only needed to take over maybe 4 times in total to take some exit ramps! It was incredible.
All in all, it really makes it just about up to par with what you would expect from something like a tesla (not my words but seems accurate) . It cost me about $850 in total and about a 1/2 hour to install.