I'm in love with mine too! I charge it every night and almost never run out of battery...even on weekends. I primarily use it for e-reading, words with friends and jigsaw puzzles. I don't leave the wi-fi on, checking my online games once or twice a night only...but I have finally learned how to utilize bluetooth to upload files to my galaxy...handy for ebooks.
My favorite ereading software is moon+reader. I just wish I could figure out how to utilize Calibre to send the files to this device.
I did try the Galaxy 5 and found it too big for ereading. And the screen is incredible...so crisp and clear.
I definitely recommend it too