(1) The battery life really is awesome. I get a full day of near-continuous use - including video and such - out of the internal battery, plus another out of the battery in the dock. On the downside, the USB charging cable is non-standard with respect to both form factor and voltage.
(2) The trackpad really is useless.
(3) The task switching is just as bad as the author says. Each time I start Firefox, I have to guess whether it will have my old tabs or a clean slate. It's impossible even to know whether it will show up in the app switcher. Usually, if one application (e.g. twitter/email) invokes another (e.g. a browser), the second will disappear from the app switcher until you explicitly go back to the first, or else you have to go back to the home screen and launch from there. Even that broken behavior's not consistent, though.
(4) The built-in email program sucks, and K-9 is almost as bad.
(5) There's no decent ssh client. I have two - one which does tunnels but has atrocious keyboard handling, one which has semi-decent keyboard handling (Ctrl actually works and I can simulate the missing Esc) but doesn't do tunnels. Unfortunately they're incompatible with one another in some weird way, so using both simultaneously is a bit tricky.
(6) I haven't found a program to create/edit slides. I've tried for Android office apps, and as many online apps including Google's own. None could handle so much as a simple bullet list properly. Most couldn't even put the cursor in the right place half the time.
(7) Text selection and cut/paste sometimes work (inconsistently across applications) and sometimes they don't. Cursor keys sometimes work and sometimes they don't.
(8) Stuff on the web can be very flaky. Text-entry boxes (e.g. here) often don't scroll properly as you type, so you have to scroll manually. Sometimes you lose the ability to reposition the cursor either by pointing (see point 6) and never had it via cursor keys (point 7). That's why I'm on the Mac now, after two rounds of that. On other sites (e.g. Quora) text-entry boxes fail to keep up with typing and just randomly set you back to the start every couple of words or so.
That's a lot of glitches and complaints, huh? I must hate this thing with a burning passion, right? Actually I love it. For video, games, and passive content consumption it's pure awesome. It's light, the screen is a joy, changing orientations on a whim is incredibly handy. As soon as I try to do or make anything with it, though . . . well, then it becomes a big sack of awful. It's an amazing complement to a real computer, but certainly not a replacement for one.