Review (5/5): THE BEST!  Better than Super Blue, Glam Seamless Tape, and Satin Strands.  Try it!
I have had tape-in extensions for several years and these are BY FAR the BEST replacement tapes I have used. I only use Glam Seamless extension hair and these fit those pieces really well. I love that these can easily be split in half because when I place my extensions I use a single piece and fold it in half, rather than sandwiching 2 pieces, to put less weight on my baby fine hair.
I have tried many types of replacement tapes including the "Super Blue", and in a pinch the super cheap (quality, not cost!) Satin Strands, and these far outshine them all. With all other tapes I always lose 1-2 pieces every time I wash my hair (which is only 1x/week), and the rest slip a little with each wash. So because of that I always put them in as close to the scalp as possible. To my surprise, not only did I not lose any with this tape, they didn't slip at all, not even a little! So I had nearly 2 weeks of my extensions remaining really tight to my head! I almost pulled them out because they were getting uncomfortable, but I ended up sticking it out.
It has now been just about 6 weeks and I am going to pull them out and reset them within the week. They still haven't slipped very much, and I still haven't lost a single one! By this point with any other tape, half of them would have come out by now! I could easily leave these in another month without much issue, but my baby fine hair knots easily when there is any outgrowth.
This tape is a little bit thicker than other tapes, which is likely why it holds so well. When putting the two pieces together, really press down and squish them together to ensure there is a secure contact with both sides. Then heat set the pieces between a hot iron on low for 5-10 seconds - this is not in the instructions but is recommended on the product's website, so I did it, and got really great results!
Because these have such a strong hold, I just ordered the C-22 solvent to remove them. I normally use coconut oil, but suspected I might need something a bit more to remove these. I will update my review once I remove them and share whether or not it was more difficult, compared to other tapes.