Has anyone ever had a Radiofrequency ablation?

So here's today's Saga. I was supposed to get epidural #3 today. Well, turns out I didn't get the shot. Why? My MRI showed stenosis with some nerve impingements at L3-L4 and L4-L5. The pain dr went over my reactions to the previous shots, which really provided relief only 1 time, and only for a day or two, along with my current symptoms. My pain is least when walking, and worst when twisting or sitting. It never radiates below the knee, and now rarely even to the front of the thigh. It is also inconsistent in the level of pain (from 2 - 8) and seems to be helped somewhat by acupuncture. He then said "your pain is likely not from the stenosis, but more likely from arthritis." (Years ago I was told I had arthritis in spine, but never treated it - only this year did the pain become unbearable, thus the MRI) He then proposed doing injections in 3 facet joints, telling me to go home and twist & do motions that would normally cause pain. If the pain was less, that's likely the issue. He said he'd do the same injection again in 2 weeks to confirm. THEN he'd do Radio Frequency Ablation, which he said would provide relief for probably 6-9 months, but possibly longer. He was ready to do the facet injections then & there, but not having a clear understanding of RFA I was reluctant, and he told me to think more about it & he can fit me in next week. He explained that RFA kills the nerve that transmits pain to the brain. I had thought it killed the nerve that runs out from the spinal cord into the leg. Now I need to learn more about RFA. Any experience with treatment like this?