I have an e-reader - a 1st generation Nook. I like it very much; it takes books bought from Barnes and Noble and therefore with DRM, and also epub format from other sources. I find reading on it a bit different from paper; I seem to concentrate on what I read a bit more, and it's not easy to flip around on the book. The eInk is very easy for me to read; it's not quite like paper, but much more pleasing to the eye than a computer screen, and the e-book is very portable. You will need a case for it, and you probably should be able to read it in the case. I use it for reading novels, mostly. A lot of the non-fiction I read has footnotes and maps and extra bits, and those don't work well for me on a basic e-reader. I have not tried any of the tables yet. I have not yet taken it in the bath

However, having the e-reader does not do a lot for replacing my paper book collection. Much of what i have, and what I want, is not yet available in digitized form. Older science fiction, mysteries, novels, general non-fiction - this has largely not been converted by the publishers, and therefore the books still take up space on my shelves, and I still buy them, used or new. It is possible that eventually more books that I want to read will be available in the epub format I prefer, but that day is not this day. Gaining space through e-books is not really a possibility for much of my collection. If you tend to read recent fiction of various genres, published in the last 4 years, you might find your situation different.