I Have Severe Gastroparesis. I Had A Neurostimlator Placed In

I have severe gastroparesis. I had a neurostimlator placed in May, and with adjustments, it was doing a little bit, but was also making many symptoms worse. Now it has just stopped working. My doctor is very hard to get into, but I'd like to talk to him about having a GJ tube placed. This was discussed shortly before the neurostimulator decision was made. What are some of the pros and cons of this?