Liposuction is for spot reduction, so although you won't see a big difference in how much you lose, you will see the areas that you got treated reduce in circumference. So, after you get your surgery, don't look at the scale. Instead, look in the mirror to see if you like what you see.
You will lose inches with the Smartlipo procedure, but it is hard to say for each individual. Of course this depends on how much fat already exists, your skin elasticity, etc. Ask your surgeon, for they will be able to give you a better idea of what to expect.