Pros: Well constructed. Gets greatest separation of drives possible within the space.

Cons: Does not work with any rail based 3.5 drive bays (tool or tool less). How many computer cases have been manufactured in the last five years that don't use rails for the 3.5 bays?

Overall Review: Would be perfect if the out attachment plate mimicked the size and standard hole pattern of a 3.5 inch hdd. Then it would be compatible with all rail based systems.