When you're rolliing, the roller slides off all the time.There's no cardboard in the inside of the refill so the adhesive sticks to the plastic and unrolls on the inside so you keep having to take it all apart. Rubbish. Can't believe 3M put their name on this junk! Not even sure if it's really made by them. Seems like more of a Chinese knock-off. Not worth the time to return this for such a small purchase. There weren't to many options for this [push] style of roller.