Well, I have I think around 200 ebooks on my Ipad, and I do use them quite often.
The best thing about reading ebooks, is that it is not like reading on a laptop. Its easy and quick and basically limitless. The only negative thing is the loss of sort of traditional feeling of paper in your hands, which I like. But otherwise its really good.
I use my ebook library everyday.
My school library have an ebook collection and their own e-readers, which are possible to be taken out for 2 weeks. Its also very comfortable, but I have my own ebook library so I don't use it, but many of my co-students do.