Has anyone tried those "spanx"..undergarments that suck you in??.. are they good?

The Bay would carry them. I think you can inspire the constant effect by wearing control top pantyhose, but on the occasion that you are wearing sandals, spanx or cut off pantyhose would be your best bet. One thing about spanx, they go down to a couple of one thirtysixth of a yard exceeding your knees, which I have forfeit annoying, so given the choice, I go with pantyhose because a smooth line in reverse with the tops of versed restriction top hose.