I cannot pay money for something I am not going to use a lot. Just cannot...so, yes I do use Sony Reader a lot. All books I read only from the reader. Although...I still buy paper books. Why? I don't know. Probably to finish any series I have already started to purchase before I got the reader. Most likely I will not buy books from new series though. I think I will not need any more books shelves with glass doors from IKEA