I started out with the Sport and then upgraded to the Elite. The Sport version is velcro and I didn't like how wet it felt on my wrist after I swam. The Elite is made from silicone so it stays dry. A minor thing, but I find it more comfortable.
Road IDs also make great medical alert bracelets. You can opt for an interactive model so that you can keep your medical information up-to-date online. In an emergency, a caretaker can access your secure online records or call and talk to a live operator to get access to the information you want them to have.
I also recommend wearing one when traveling alone. I gave my son one to wear when he traveled through Europe on his own. He didn't actually wear it, but I still think it would have been wise.