Benefit 1 - delivery. My latest book order from World of Books was ordered on a Wednesday evening and had arrived on the Saturday morning. This is a FREE delivery service and in my eyes is fantastic. Benefit 2 - sustainability. The site has a HUGE range of second hand books which have been passed on from one to another. A great way to make a small difference in reducing unnecessary waste and production. Benefit 3 - cost. The prices of these books are so reasonable with many books in the email recommendations being just £2-odd. I saved about £4 on The Milkman by Anna Burns and when it arrived it was practically brand new anyway! Benefit 4 - choice. As mentioned previously the range of books is huge. When I see recommendations in other well known book stores I search World of Books immediately and i have always found it available. The newsletter emails provide suggestions too which is helpful. I have never had to return a book or ask for a refund so I am unable to comment on this but I believe the process is straight forward.