One of the schools I am working at ordered one of these about six months ago. It was bought through an Apple reseller along with a number of Ipads (15). The cost of the device was not cheap! So lets see what you get for your money. There are 16 slots for ipads and one larger slot for a laptop, 16 short charge/synch cables, an internal 240V socket for the laptop charger and an external 240V supply socket.
The external case appears to be made
I have had several of these installed at the primaries where I work. As a projector replacement they work well on paper, no shadow cast, no bulb to replace, evenly lit accross the display, less wires makes for a tidier installation, toughened glass etc. There's quite a few reasons to replace those aging projectors or if you have a new build then the increased labour costs of projector installation may well off set the overall cost of one of these.
I'd say the weight of one of these