First, the singlet is backwards on the picture shown, it's made to wear the other way around, and I wear my bra OVER it.  But I bet there will be times I want to wear it backwards, we'll see (it'd probably smash my boobs too much though).

It whittled my waistline down and toned up my thighs and buns, without bra lines from the back view.

I'd say the only real problem is the size of the flap in the crotch.  It should be larger to avoid having to take the singlet off entirely.  I will figure something out, perhaps some velcro, and a bit of sewing, or maybe just cut it off entirely.

I like it well enough I just put another one in my shopping cart.