self-service technology

There are many type of self-service technology to help making things easier for people nowadays...As we talk about this topic,there just one thing that linger in my mind. It is a Book Drop Machine which we can see at USIM itself..The benefit of this self-service technology is it can help student to save time..We don't have to waste our time to go to library just for returning the books since this book drop machine is also available at other places besides library itself...But of course there's also disadvantages of using these machine..One of them is we will be less communicate with people since we just manage our business by dealing with a machine..And one thing that obvious when we talk about machine is there will be time when we can't use it anymore..