The treatment itself is safe there is no harm in doing so but if not done properly you will be losing out the best possible benefits of RF and you may be left with an inappropriate experience of something which could be much better.
This technology is a breakthrough in the field of facial rejuvenation, and thus the market is flooded with many service providers with different grades of machinery, definitely, there are no bad effects reported with the treatment, but the efficacy of any treatment is best when it is done by a skilfully trained technician and with good quality of RF machine.