The holes on the edges are not in the good size. I have alrealdy an original caddy in my dell, easy to compare. Ok, it is possible to increase the holes, but after to do the first trying, it was already too late to do a good job. Because of this little problem, about size of holes, now I have my hard disk blocked in my computer. A lot of time lost and it is not finished.
The screw hole is a little small, so you should drill to using it. And it is very uncomfortable. And the price is higher than this product's quality.