I was skeptical but I have weddings and events coming up and I needed to try something without a bra.
First of all, always test a strip on your breast for the same amount of time you will be wearing it or more (8hrs recommended).
Second, I would also recommend to test out the brand and then buy a second roll if you like it. Not unless it's not your first time using bra tape, I had to use one whole roll and two different ways to get the idea and shaping.
Second, it's sticky and held up my breast well! I'm a 36C and i do have bit of a sag/teardrop so the challenge for me was the shape similar to a bra cup. For my tube top, a bando was too constricting after awhile, and it did hold up but the method of taping (tape from one side breast to the other) and long hours made me uncomfortable with breathing - the shaping made me look like i had one large breast in the middle lol.
So Look at youtube videos and such to get an idea, and then apply that to your own breast. Everyone's breasts are shaped differently - and then check to see if what you're taping matches how it will look at the clothing you're wearing since i had to adjust tape placement. if you don't get it right, i would mark your skin with a easy to remove pen of where your clothes will be placed.
So for my breast, someone recommended to me to tape vertical first (small strip or however length you feel to get that lift) to get lift as this will kind of be your guide and anchor (start out with one strip if you can). (Shout out to the one who answered my question and helped me figure it out!) Then, use multiple strips vertical to get the shape you want. and then for hold in place, i taped across one boob to my lateral side. and then add however strips you need for support. Trim tape if needed. I also cupped my breast with my hand to the shape i want and used the tape to hold it in place. i love how my breasts look when i wear a bra so i tried to get that same look with this method.

So yeah, it's a bit of maneuvering and practice in my experience, but it feels and looks amazing! i like how i'm not wearing a bra with wires or worried if my straps are showing or slipping off my shoulders or adjusting my bra here and there. videos are great but try to practice with it, as i had to use a whole roll to get it right.

Con: i can see someone go through one roll easily if they need more support and shape so long term, it can get pricey. especially since i wasted one roll for practice and bought two more for upcoming events. but for the hassle free bras, i think it's worth it for me.

i haven't tried it in water or in humid weather.

I bought this for a dress that I wore to an event. I didn't want to wear a bra so went to research other options. I found this and thought the idea was brilliant. After testing it out, I recommend watching a tutorial on the best way to use them for your outfit/dress. Also, make sure the area you're using is clean and free of any lotion or similar product. It will not stay put if you do so. Clean, dry skin is best. It takes some time to adjust these strips for the perfect lift but won't go ANYWHERE if you do it right. This survived a night of dancing and did not move one bit. If you're even a little curious, try it out for yourself! It's worth the buy.

This tape worked really well for a backless dress I had for a July outdoor wedding. Easy to use and stuck really well. After about 3 hours of wearing the tape, my chest really started to itch. I shortly took it off after and wow did it hurt to remove (pulled skin). It left red marks/irritation after removing tape that are still there (2 days later but getting better). Overall this worked really well but it definitely has strong adhesion that itched and hurt to remove.

easy to use and painless to take off. i have a larger chest and bough this for a strapless sweetheart neckline dress. i did struggle finding a configuration that had the support i needed while not showing above my dress. i had a little peeking out but nobody even noticed. again it did not hurt taking it off and it held up VERY well all night. would def recommend

Definitely lifted and held the girls where I wanted them HOWEVER PLEASE FOLLOW REMOVAL INSTRUCTIONS I was drunk so I just pulled them off and it ripped some skin off so please just take the time to get them really wet and carefully peel off in the shower