huge fan of the mechanism of using a clip and glue/tape to attach packers instead of a harness, as i find that for me personally harnesses 'ruin the illusion' in a way and therefore dont help so much with my dysphoria.
unfortunately ive had a little bit of trouble having it stay attached for long periods of time, but ive only used tape and not the recommended derma-tac so far. ive ordered dermatac because of this, but wasnt thrilled to have to spend another £90 when i already just bought a £200 packer.
the two-pack of clips i received also included one good one, and one where the bar is pretty off-centre making the clip ends unsymmetrical, one side much longer than the other, but i've avoided using this one thus far, so i'm not sure how much it actually effects functionality.
overall, though, im still hopeful and happy with my product