you can read a very detailed review about the event and my personal experience here, https://jammiekomadina.com/2018/08/02/jack-jills-downhill-marathon-event-review-and-race-recap/

but, in short
Bib pickup easy, swag awesome (I rarely like the shirts, these tanks are wicked, AND we got a buff and a bag as well) the parking situation was great, shuttle was standard and organized, course fantastic, tunnel was cool, aid stations every 2 miles which was great even on a hot day, medals awesome, i absolutely loved the race. I had some curiosity about what it would be like to run on non-pavement but it was fine, I wouldn't have liked it in a flat or rolling race but the help of some gravity made it find to keep control of the pace even with gravel road beneath the feet!