I have tried it once, it is kinda uncomfortable to keep it on the lips for 30 min straight, not cuz it hurts, but cuz jelly or silicon sticker that you are supposed to keep on your lips ket on moving and getting off my lips, so I had to keep pressing it on my lips for 30 min. as for results, i did not see a significant change in my lips size but my lips did feel plumper and it kinda smoothened out my lips creases, so I plan on making another purchase soon.