I hesitated a long time to purchase these because of the price, but finally bit the bullet and figured I could always return them if they didn't work. Boy are they worth it! The material is buttery soft, yet still perfectly opaque when I squat. The high-waist and ergonomic cut is ultra flattering, without the gimmicky butt-scrunch-seam that only seems to create opportunities for massive camel-toe. They're well-made and sturdy enough for rigorous training, but light enough to wear under a pair of jean shorts to prevent under-butt exposure when I'm out-and-about. In sum, totally worth the investment and I'm already looking to getting a few more colors.
P.S. I'm 5'2" and 135lbs and the Medium fit perfectly (not too tight, but not loose).