When did you start using the postnatal slimming belt?

I'm not so sure if it would still work for me cause it's been 15mons past already when I gave birth but I'm thinking to get one (after I've seen celebrity moms in PH had their shout out in Instagram showing off their bellies wrapped with corsets haha!). Qoo10 offers a fairly liked postnatal slimming belt based on reviews - cost is at 19.90 SGD and comes in 3pc set that would "shape you from top to bottom". http://list.qoo10.sg/item/READY-STOCK-SLIMMING-BELT-POSTPARTUM-BAND-POSTNATAL-WRAP-SLIMMING/415360913