Review on Bokaiya Extension Bearing Sliding Available by Issac Smart

I installed these in a cabinet I built for my workshop and they work great. One star deduction for two reasons. First, they were poorly packaged. They were in a very large box with almost no padding, allowing them to float freely in it, knocking every time the box was moved. A bit of bubble wrap or something would be much better. Luckily they arrived undamaged. The second reason I deducted a star was that they had no instructions. Luckily I know how to install them, but if you haven't installed drawer slides before you'll have to figure out how to do it yourself. Really guys? Can't you throw a piece of paper in a box with instructions?