In the last 5 years I've gained a stone and can't seem to shift it, problem is I still go for the type of clothes I'd LIKE to look good in ! Today a tunic type dress arrived from Next, lovely quality, lined, but it looked ghastly on! Do Spanx really give you a smooth line and knock a dress size off? Or is that wishful thinking? I've ordered some to try... But before I part with 33 quid on a pair of knickers I'd like the brutal truth!