I have the same question as you. Has anyone had a HF10 installed for severe arm pain. I have CRPS from finger tips and now up to the side of my face. My orthopedic doctor that this a last resort that he know's of to relieve this terrible pain I've lived with for more than 7 months. I just got approved this week for trial. Awaiting insurence to go through, approx. 1 week and then will schedual. I would love to hear from anyone that has tried this for upper limb. I will definetly do the trial. I have nothing to loose and hopefuuly get the 50% possible relief. Darryl