Compression garment/faja: Does it really make a difference? (photo)

I know that most surgeons recommend a compression garment for a few weeks after lipo. But in Colombia, they give you a super tight faja to wear for three months. Does this faja make any real difference in the end result? I'm wearing one, and I need to have it taken in. When I first got it, it was super tight. I'm 6 weeks post op now. Not sure if not as tight now because my swelling has gone down or bc I stretched it out over the last few weeks. Thanks!