I have been using this product for quite some time now. I find it literally indispensable, especially for any “careful†or painstaking sanding jobs on large scale models. The variety of “grits†makes it very useful to grab whatever is needed at that particular moment. The good quality is quite consistent. My only objection is that this product is not durable enough to withstand wet sanding, which is for me essential due to the need to reduce scratch marks, which wet sanding is more likely to achieve. Still, it’s pretty easy then to revert to a finer grit stick to minimize scratched plastic surfaces, a modeler’s nightmare.