The Aluratek Libre eBook Reader Pro has a five inch reading screen. In the font I usually use to read, this is about 4/5 of a paperback book page. The dimensions of the reader itself are 4.25" x 6". It can be used in either portrait or landscape mode, with the tap of a button. Font size can also be increased through five levels with the tap of another button. The reader automatically shows the book you select to read on its screen, whatever the format.
Books you open to read are linked to the recent readings page, and when you select the book, it will open at the page it was at when you left the book last. It will keep several books in recent readings, so if you have been looking at two or three different books, you can select the one you want to continue with. They all start where you stopped and closed the eBook file the last time.
One of the features I found most convenient was the reflow ability in reading PDF documents. When you have it turned on, the text on the page of the PDF realigns itself to fit whatever size font you have selected. It does not extend reflow from page to page of the original PDF, so as you read, the page number may not change for a couple screen refreshes, and then you may get a page that is only partially filled with text, as it is the last of the text from that particular PDF page. When you page forward again, the new page of the PDF will then reflow to fit your screen and font choice as well. If you want to view illustrations or diagrams in a PDF, you need to go in and turn off the reflow option on the menu, so that you can view them properly.
It has an LCD TFT screen, which they sometimes refer to as e-paper – as opposed to the e-ink in the Kindle and Nook. As you click to turn the page in the eBook you are reading, there is no black flash such as you see in the Kindle and Nook e-ink readers. Instead- you look at the screen while you press the button. and suddenly, without discernible movement, there is new text on the page. I also like this feature, as the black flash when you change a page in the e-ink readers bothered me when I tried them out.
Like the Kindle and Nook screens, the Aluratek eBook reader can be easily read outside in full sunlight without any eye strain. While it is not a color eBook reader, it does show pictures in 16 shades of grey, so viewing a picture you load on the reader is similar to looking at a black and white print, without quite as smooth a shade gradient. You can also listen to music while you read if you load your reader with MP3 files, and use the included headphones.
You can set up any sort of file hierarchy on the SD card, to organize books by genre, author, title, or whatever method suits you best. It is actually a good idea to break up books into multiple folders. I had all my books in one huge file when I first put them on the SD card, and they took a noticeable time to load. When I broke them up alphabetically by letter, and then into three larger files of A-H, etc., opening books happened almost instantly. It was an impressive difference, and only the 2000 page grammar book I mentioned above took noticeable time to load.
It does have a feature which allows you to set pages to turn automatically at set intervals, but I found it frustrating to use. I could never get it quite right for my reading speed. It was also slow to get the reader to go back if a page went by that you had not finished reading. This is probably my least favorite feature.
Another feature I do appreciate is the ability to set a time for the reader to shut down if nothing happened for a certain amount of time. This saves battery life. So, if you fell asleep reading, you would not wake up and find it had been on the whole time. There are several settings to select from for how quickly it should turn off.
image from Aluratek product page