We purchased two of these, they are quite large externally but this gives a practical interior size.

It can easily hold 15" laptops and external diskdrives.

Ordering and delivery to multiple sites was easy and the delivery team installed both units where we wanted them without fuss.

There is no way I could have done this myself as they are heavy.

One thing which was less practical was entering a second code to the keypad, this requires removing the lining of the door to access a button. This is not made clear in the instructions but the customer support was excellent and they got someone to look into it and call me back same day.