I did a relay team for this half Ironman in both 2016 and 2017.
The good:
Great swag. Cool tri bag, nice tech t-shirt.
Course information and expectations are clearly communicated at the mandatory athlete's briefing before the race. There were several times from which to choose. The course was nice. The swim was in Delaware State Park, the bike was on country roads around Delaware and a fairly flat route and the run was two loops on a little bit of a rolling hills course with a little shade. Not much though!
The bad:
It is not easy for the relay team runner to see their swimmer get in the water because of the way they release traffic from the Delaware State Park parking lot. No cars can leave until the swimmers are out of the water. So if your cyclist is speedy (like ours!) then you have to hope you get back to T2 before them! It's a bit nerve wracking but we've made it both years we've done the race. I'm glad they've brought a 70.3 to Ohio. Ironman does a great job with all of their events. I'm sure they will iron out this logistical wrinkle somehow. Maybe allow a shuttle for the relay teams.