I bought this several months ago because it came more than two to a package, and had a convenient grid for sizing. I have used about half the package. At the same time I tried another brand on a different device to compare the two. There is no real comparison. This one is stiff, which would seem to make is tougher but somehow doesn't. In addition, it's more difficult, not less difficult, to position. I need to replace this one at least twice as often as the other though they receive about the same amount of use. Bottom line is that I won't purchase it again and would not recommend it.