I was a bit skeptical that this would hold up to our two, very rambunctious, golden retrievers running up and down the stairs all day, but two weeks in, and they haven't moved a mm. I had no problem doing 13 treads with the amount provided, but I cut it about an inch short on both sides after reading some reviews saying they didn't have enough to do a full set of treads. If I had to do it again, I would still cut it a bit short, but I would then cut it in half an install it as close to the sides, and front of the tread as possible. The reason for this is that with them being a bit short, some of the corners are starting to curl, which is probably more due to the treads than the tape, but with it installed that way, I think it would prevent that from happening.