I have the RoadID wrist bracelet, and don't even notice it when I ride. I also wear it when I go trail riding on my horse by myself. I also have an index card with basic emergency information that I keep in my saddle bag on my bike. That way if my bike and I get seperated for some reason there is information with my and with my bike.

Speaking as a former firefighter and MRT and current 911 dispatcher I can give a basice idea of what would happen at hte scene. The medics are going to be concerned with immediate treatment and are not going to go searching through your bike bags for info BUT usually that is something that the investigating police officer will take care of. Medics are trained to look for medic alert bracelets/necklaces so they should find the RoadID quickly. Again, while the treating medic may not have the time to call RoadID (for those with the interactive version) there is usually someone else on scene (firefighter, police officer, etc) that can make the call and relay the necessary info to the medics.

I love the peace of mind it gives me knowing that emergency personnel can get my medical info and emergency contact info immediately. I always attach my bracelet to my helmet after every ride that way I always have it.