I wanted a cheap sling that I could use for fishing so I was happy when I came across this sling that was cheap and Amazon Prime eligible.  I received this sling in 2 days and was pleasantly surprised with it.  I have started using it for school as well.  I can fit a spiral and a book or a spiral and my Lenovo X220 in it but I don't think all 3.  I plan on putting my tackle boxes in it while fishing and possibly by Nikon D5100 in there as well if they both fit.  I am happy with my purchase though as it is comfy to wear and has enough room for items.