I've used accountants and I've used TurboTax. My family is populated with accountants actually. After catching substantial mistakes from two accountants (one family member, one "other" professional) I've decided to stay the course and do my own. Don't get me wrong - TurboTax is still a pain in the ***, and still needs to be improved, but it beats working through the forms manually.
Now, why we're subjected to this kind of abuse EVERY frigging year is beyond me. Bring on the flat tax. Tax me on what I make, tax me on what I spend. I don't care - lets just level the playing field and save billions of hours of effort a year.