The case is a little junk. The disc is not required and moves slightly inside if it is moved, it is not reassuring. No fan, that's what I wanted, but not outright open either. So no ventilation ... not let the drive overheats.
By cons good point for the switch, that not everyone :)
In short, it is to use a disk occasionally (eg backups) and we do not need to lug around too.
If it is for one disk to use almost constantly, or that travels often, better not ...