I have used IceDot since starting cycling and have had no problems with it. However, they have been bought out by Specialized and now the only option is their crash sensor. Which you need to used their app for it to work, it needs to be open and running when you are riding and is dependent on cell service coverage to deliver any potential emergency notifications. I had no choice but to get one to renew my IceDot membership ($10/year) but after this, my understanding is that the wrist bands that I have been using will no longer be available. To that end, what other options are out there. I know of RoadID and I am kind of leaning that way, but would like to see what other options out there that may be worth exploring.