My department uses the F A S T One and has had a good bit of success. Of course, there are the occasional situation where failure was imminent using this device. Such was the case of an elderly lady with severe osteoporosis. It shattered her manubrium. However, she was a med-code and due to a vast PMHx had practically a nonexistent vascular system. Was worth a try. It does look rather midevil but isn't really as bad as it looks. In fact the training video that comes with it shows the doctor that helped to invent it having it used oh him while he is conscious. There are a series of large needles in a circular pattern surrounding a 16 gauge needle. The surrounding needles do not enter the body but are there to measure the depth so that the device can correctly place the single 16 gauge that does enter the manubrium. It is not a gun. rather it is placed by the arm strength of the provider alone. There are no spring action or mechanical parts. Our protocols have implemented them by first attempting IV access either 2 attempts or 90 seconds. At first the ERs in our area looked at us kinda funny when we would bring a pt in with this in place but latter they became quit fond of it in the absence of IV access. When we do use one we tape the tool for removal to the IV bag so the ER can remove the device if needed. We do continue to attempt IV access at convenience throughout the rest of the call. But the F A S T One is exactly what it says. FAST and very easy to place. But I must admit if given the choice between the F A S T One and the Easy IO I believe I would opt for the latter.