I read on my Kindle Fire. I've put the Google Play store on mine - straightforward if you follow the instructions found on the web exactly. I use Kindle books, Kobo, Google Books, Open Library, and BorrowBox.
It's not as good as a dedicated ereader in sunlight, but perfectly useable, with an extremely good battery life. Each app works slightly differently though - some allow page turns using the volume control, some don't. It gives me the choice of provider for the best prices.
I don't think I'd go back to e-ink, although the newer smart-ink technology is looking very promising.