My personal experience, from having been an e-book aficionado who eventually went back to almost entirely paper (cheap used hardcover when I can find it):
Ebook advantages:
- Cheap, no commitment, try before you buy
- Easy to transport, take 30+ books on vacation with no increase in weight
Dead-tree advantages:
- Higher retention of material (various cues for memory related to the physicality and layout of the book versus an indistinguisable smorgasbord of ebook pages)
- Greater tendency to actually read, since they sit around your house/living room taunting you, rather than being forgotten in some obscure folder of your device
Ebook advantages:
- Cheap, no commitment, try before you buy
- Easy to transport, take 30+ books on vacation with no increase in weight
Dead-tree advantages:
- Higher retention of material (various cues for memory related to the physicality and layout of the book versus an indistinguisable smorgasbord of ebook pages)
- Greater tendency to actually read, since they sit around your house/living room taunting you, rather than being forgotten in some obscure folder of your device