What I liked the most about these Spanx capris is the fit (which was right on par- I am 510 and 280lbs and ordered the size F) and the smoothing effect on my rear and middle section.  What I did NOT love about these capris is the lack of durability and no slit in the crotch in order to visit the restroom without having to pull the whole thing down.

I bought these specifically for under white leggings for a wedding.  They looked fantastic.  But, the first time that I had to go to the restroom and re-work myself back into them, it was very difficult to do alone, probably because of warmed up dancing skin.  Where the thicker leg/body portion joined the pantyhose type leg (which is subsequently where you typically pull to get them hiked up your legs) did not seem very durable. Upon my second visit to the restroom, the durability completely failed and the pantyhose leg ripped away from the thicker body portion.  COMPLETE wardrobe malfunction.  I had to do my best to get the rest of the capris into place and survive the night.  I like the idea of these capris... but the actual functionality was not good, and the fact that I bought these and only got 1 use out of them is very disappointing.