Hi Laura,
Microfibre shapers can work well if correctly sized and you have a body shape that accepts the cut chosen. Clearly the model putting the top on in the ad, needs no control whatsoever, but then thats not unusual for advertising.

The mistake a lot of us make is to buy a size smaller, thinking that we will miraculously shrink, only to find that the garment rolls up or down, forcing those extra pounds to pop out somewhere else. If we have a fair amount of body fat in the wrong places, then boned waist cinchers that look great on a slim body give us a "dumbell" shape, ephasising the width of the shoulders where excess fat pops out round the back under the shoulder blades.

One of the things to realise, is that a hint of shape and a clean line to clothing without bulges can be just as slimming as actually lossing weight. What I like about the garment shown, is that it appears to deal with the upper back area, which could well help give a slimmer appearance to the upper body/shoulders and better posture. So using it whith a pair of appropriately sized control panties with a nice wide waist band stopping the lower part of the top from riding up, could work well (not necessarily the ones sold there which seem over priced).

Sizing for mail order could be an issue, and with your tummy size, I would work off a compromise between size guide for both the pantie the top and not just the top.

So its a cautious thumbs up from me for use on special occasions, and not so much for every day.

Chrissty