Very nice quality, I tried both the grippy and the sticky versions of the triangles and like both very much! They're gentle, odorless, durable, washable, and seamless. All the things they are advertised to be. I don't have issues with the grippy ones slipping off (I wore them with a sports cami).
FYI, I got the OG size, I'm a 32 DD. I can get away with them in terms of nip protection; however, I think the + size in the triangles would be better for shaping ability.