I have been using Turbo Tax for years. In the past when I did them by hand it was a total mess with having to use calculators scratch paper and erasers.
What's great about it: Turbo Tax does all the math
What's not so great: I live in Fl. So I don't need the State Tax software.
My spouse and I live in Indiana, but were married in Vermont. Turbo Tax walked me through all the complications for filing as married with the US, but having to file as single in Indiana. Plus, we bought a new house and rolled over some 401k money! Super easy and affordable. Thanks!
TurboTax has been my tax software of choice since 1996. Always very straight-forward and consistent. Easy enough for a beginner or the experienced preparer. I did find one error in the Kansas software and it was difficult to tell someone about it.
What's great about it: Very straight forward.
What's not so great: Found one mistake in state program. Difficult to contact anyone without waiting on pnone or online forever.