I find highlighting text, copying and pasting, and other forms of text manipulation to be infuriating on the iPad. It isn’t that it's a bad system—it’s probably as good as it can be, given that the device relies entirely on touch. An external keyboard would make the application better, but at that point you're practically carrying around a laptop wherever you go. The iPad, a keyboard, and Pages could make a decent word processor for a kid, but with the abundance of cheap laptops, desktops, and older machines that can do the same thing for cheaper, it’s hard to justify the cost.
Arstechnica
I absolutely dread having to go an manipulate text I've entered on the iPad. As I indicated before, you're in for a "warm" time if you have to place the cursor within a word or God forbid a URL. Zooming helps a bit but still this needs to be addressed.