I purchased my rig used and it had an ASTRA on it. Not knowing anything about it, I did some research and like what I found out. I like the easy use of the ASTRA. Turn it on and it is on, just remember to turn if off after a dive to save on batteries. Other skydivers may look at you because the aad is visable and it looks like a student! I say so what! Open their reserve cover and you will probably find a Cypres. No matter if my aad is visable or not, at least I wear one.