My wife has had the Nevro about 5 years the first 2 years it worked great she got a lot of relief since then sh has had a lot of issue she is not getting very little relief and about 3 months ago she started gettin a lot of pain so she turned it off and the pain went away and turned it back on and the pain came back she has an oppointment with Nevro tech to look at the machine she is wanting it removed because the last 3 years it was been worse with it in and it takes over 3 hours to charge it and does not stay charger very long