Overall, the advantages of 30 years of improvements have been that more fat cells can more easily be removed, with less blood loss, less discomfort, and less risk.
Not everyone is a good candidate for liposuction. It is not a good alternative to dieting or exercising. To be a good candidate, one must usually be over 18 and in good general health, have an ongoing diet and exercise regime, and have fatty pockets of tissue available in certain body areas. Significant disease limiting risk (e.g. Diabetes, any infection, heart or circulation problems) weigh against the eligibility of a person for the procedure. In older people, the skin is usually less elastic, limiting the ability of the skin to readily tighten around the new shape.