He attributes it mainly to using too light a setting. Pro's Because jet injectors are more precise in delivering the desired dose of insulin, as Dr. Neufeld's study demonstrates, they offer the opportunity for tighter control. And it is precisely tight control that means fewer complications, according to the 1993 Diabetes Care and Complications Trial. Also, people have reported that they need far less insulin, although I haven't seen it personally in my practice. Frequent injections also means tighter control.
Nobody likes needles.
Other advantages of jet injectors, as enumerated by Front Line Strategic Management Consulting, include eliminating the need for sharps disposal and the risk of cross contamination. Different settings also allow adjustment for different skin types. Plus, they are portable enough so they can be used discretely when away from home. While jet injectors seem to be expensive, they are also less expense than syringes, Mr. Garcia points out. You don't regularly have to buy boxes of syringes.