Procedures such as SmartLipo, VASER or traditional liposuction provide great results when performed by trained physicians. The results are long-lasting and sustained so long as the patient maintains his/her lifestyle. The perfect candidate is one who has a stable weight, exercises regularly and maintains a healthy diet. The fat cells in our body a made to store fat and they are very efficient at doing this. What this means is that any fat cell can store more fat and enlarge even after liposuction.
If you are planning on gaining weight or might be pregnant in the near future, then you are better off waiting until after to have your liposuction. After pregnancy get back on your diet and exercise routine. Once you have achieved your pre-pregnancy weight then look into your liposuction procedure.
One more technical note. Liposuction, SmartLipo and VASER are all invasive procedures. They are what many of us call minimally invasive since they use small cannulas (or tubes) to remove the fat but they are procedures and do have healing time.