Program does not allow optimized treatment of deductions on underpayment form (can not provide either std or itemized deduction per quarter). For last 2 years (maybe 3) program would not allow federal filing, would not provide feds with proper "last years AGI" or "spouses AGI" (no such thing as a spouses agi on a joint return). Had to paper file.
Pros: Easy to prepare, Easy to import documents, Fast
Excellent software. My only complaint is in the printing of tax forms, I would like the ability to print individual pages and not be required to print pages that have no tax information on them, (pages with "0") on the entire form.