I didn't really know what to expect, but I've been pleased with these. The rings have a certain amount of firmness/thickness, so they work well for my purposes. Basically, I bought a daytimer in January that is spiral bound... horribly so, because the spiral is loosening and causing the pages to rip and fall out! So, I've been using these reinforcement. I snip into one of the spheres, and because they are fairly firm, they hold their shape as I edge them around the spiral binding. I haven't had any problems with the spheres sticking to themselves (the way tape does), and not a single one has broken. I like the colors, too.