Fairly quick, seems comprehensive, easy to go through the interview, or skip around through the forms, if you need to do that.
Has some quirks such as reporting the date/time of acceptance of the return by the IRS according to GMT, rather than your local time zone, but it doesn't tell you it's using GMT. Also, only asks about payments of withholding to date, and not about expected withholding in the rest of the next tax year, so if you don't put in the expected withholding it overestimates the amount of estimated tax. It also asks you about a state return items even though you might live in a state with no income tax. Does not, apparently, import a 1099 MISC from an institution.
Pros: Easy to prepare, Easy to import documents, Fast