Dear MelbourneMama:Congrats on such a great BMI! Non-Surgical Body Fat reduction is based on the transfer of energy across the skin into the fat to selectively destroy or fatally alter fat cells. These energy devices since the creation of them some 20 years ago have been mostly disappointing. Their down fall is that they: hurt too much or injure the skin to accomplish their goals or they do not deliver the energy required due to the patient's inability to tolerate the pain.The energy's used are:laser ie focused light waves (eg. Sculpsure)ultrasound ie focused sound waves (eg. Liposonix)radio-frequency (eg. ThermiSMOOTH)direct heatcooling (eg. CoolSculpting)Other than CoolSculpting, the others depend on heat. CoolSculpting is tried and true. It cools the fat to a non-frozen temperature that it selectively turns off the cells ability to function and dies (apoptosis). Other than Zerona, a laser device which as fallen from use, the injured cells from the above die and do not come back. That is not to say that ALL the cells die so those remaining and those distant from the machines "reach" remain active and able to absorb redistributed calories to become bigger. Cost is an issue due to the expense to purchase these machines, the on-going costs of supplies, maintenance and training of personnel. Good luck in your quest to find the "perfect" option for yourself. I wish you the best.