My stimulator is from Abbott. I've only had it for 3 weeks. The first week when the rep was dialing it in I never felt any stimulation where my pain is. I just started dialing it up 3 numbers every 3 days. Today I think I have a little relief but I'm not sure it's the stimulator or the fact that I spent 2 days in bed from the pain. Everyone keeps telling me to give it time. Will keep you posted.