Used to the flip, now wishing for ragged right.
Since I've been reading Kindle books (yeah, I have a second one) for a couple of days, I've gotten used to the page flipping feature. It's a little more convenient now that I've discovered that I only need to touch the left or right side of the screen and don't have to physically swipe across it.
Currently my only complaint is that the text is left- and right-justified instead of ragged right. I much prefer the latter, especially on the newspaper column-sized display of my phone.
Other than that, the text is beautiful and easy to read.