Gave up on TurboTax when they tried to ram through payment for every return filed and switched to TaxCut. Decided to try TurboTax 2012 this year due to a more complicated return. First, the company falsely advertises the ability to import H&R Block TaxCut files via pdf. However, it doesn't work and hasn't from day 1 when the 2012 version was released. After 6 weeks of repeatedly contacting them, they basically said to enter things manually as they were not going to fix this known issue. Yet they never stopped advertising that feature. This is just plain negligence by Intuit.
Second, no information is provided on any of the updates. The update just released on 29Mar doesn't even tell you what was fixed, patched, or changed and if it would have any impact on a return already filed.
Finally, they keep pushing via their ads different (and more expensive) versions even though they have no applicability to your current tax filing status or situation.
TurboTax is better at Schedule C forms and the 2106. It continually came up with different results for the AMT than TaxCut, even though the data was the same. Manually doing it leads me to trust TaxCut over TurboTax. TurboTax did not have the embarrassing problem with forms that TaxCut did this year, so I reverted back to TurboTax (after having to manually enter all 2011 information needed for 2012 since IMPORT does not work).
Overall the continued lack of support for Mac users or fixing problems that are known to exist is why I rated the program poorly. It's greatest strength is the ease of use and ability to switch between the interview and the form, something TaxCut is very, very weak in (you often can't manually enter information in a form).