I bought four of these drawers and am very pleased with their quality. They all glide well and the plastic mats are a nice touch to keep the cabinet flooring clean and to keep things from falling through the wire bottoms. They do come with directions and my husband installed them without too much trouble but agreed with some other reviewers that it would have been nice if the manufacturer had included some magnetic screws. The screws that were sent with the drawers were ok and held up well but he got around the keeping them in place for screwing into the hardware holes by dipping the screw heads into a little sticky honey. He also did not find it necessary to pre-drill holes into these particular cabinets for using the screws. My cabinets are 15.5 x 22 so I purchased the 14 x 21 drawers which fit perfectly. The only caution I have when purchasing pull out cabinet drawers is to be sure how you want to install them. The first ones I bought and returned (another brand) had to be installed on the sides of the cabinet which I didn’t realize until after they arrived. Upon looking at the situation, my husband felt that, in our case, it would be much better to install them on the cabinet floors instead which these drawers do. Overall, I recommend these drawers. They have made getting things out of the back of my cabinets a breeze!