Greetings, I want to first off say that I admire your grandmother and you for looking into options that can lead to a better quality of life. I had the same unit implanted and did not find it that difficult to recover from. It was sore at the incisions for several weeks but I was working the day after I had my implant. I also have a very high tolerance for pain.
Here would be my concerns. How well does your grandmother adapt to changes? After healing from the initial implant, she would have to get used to the sensation that the generated impulse creates. Some find the sensation difficult to get used to even though you have some control over the sensations and can have at least 4 different preprogrammed settings.
How well does she do with managing hand held control units. If she tended to get frustrated easily, that could also be an issue. The controls are simple but depending how much she used it, she could have to reset the unit as often as she wanted a setting changed.
There is usually a week trial period that is done before the implant is done. It was my experience that the trial was less effective than the implant. During the trial, it can be adjusted at the doctors office with the boston Sci. rep at any time.
Some people seek the route of an SCS to reduce the pain and some to help reduce the pain and the need for pain relievers. It is common to continue the use of pain meds after getting the SCS implanted. I count mine as sucsessful but my meds increased by over 8 times the meds I was using before but that was due to me being so undermedicated to start with. I hope this helps and if you feel you want more information or have specific questions, I would be more than happy to assist. Blessing?