Im giving it 5 stars because the energy emitted is safe for regular mini treatments and the results are good. I think with the regular treatment you can see the results, it's not like getting a high energy treatment at the doctor with the RF machines. This is a smaller product that with regular use can give good results but nicely gives instant skin tightening effect. Be sure to make correctly place the device flat on your skin with both plates touching your skin or get you get a little shock haha. (also, same as doctor...they shock you more I think when they get lazy!) And use with GEL like ultrasound gel, IPL Gel or aloe vera gel etc.