I've only used the tummy control tights. Bought on a whim from F&F. I was surprised how well they did the job - really made a difference in flattening. They will attempt to cut you in half so either hitch them up under your bra or cut the seam about an inch and fold down.
I have bought other control wear. Stuff from Primark - cheap and does the job. Spank shorts -hellish to get on and uncomfortable. The best was from Debenhams an all in one that goes under your boobs - comfy all day long.