Storage capacity- it's fairly big.
Easy to fit IF you think about it first. Fit one screw then drill the next hole through the box. Hang it on two screws and drill the next two. etc. Might be easier with longer screws so you can get the rubber spacers on more easily, after drilling.
The fixing instructions and fixing bits were a bit basic. I could not see where to put the rubber washer things. I put them between the wall and the back of the box which stands it off a bit .
Quite expensive given the lightweight metal used.