It's not a bad purchase, but it's like they didn't consider fat people would buy this.  If you have big thighs, then you may not be comfortable in this.  Although the underwear fit, they won't stay up on your waist if you have big thighs.  The legs are so narrow, that the underwear will constantly pull down as you walk and ultimately will come completely off of your butt.  Whatever size you wear, go up one if you expect this to fit.

As for the material and the design, they look awesome.