This is good for crops or classes when you are not sure exactly what size picture you want to add. this way, you can move stuff around.
I like the newer Tombows that have the dots adhesive instead. (same packaging, just a newer model) The dots go on easier than the strip shown here.
I use this one and the Mono Adhesive permenant tape and I think they both work great. I've used other brands and they are usually not as user friendly as this one or don't stick as well either. It's affordable and does it's job.