Review (5/5): love these!  Every bit as good as the more expensive ones...
I was skeptical since these were so inexpensive... I bought some other "glass files" on Amazon that cost quite a bit more but these are exactly the same... I can't tell them apart aside from the color and writing... I can see how they might break if dropped but that's the case with any of these files... I'm never going back to nasty cardboard files again! You can wash these and they last forever!