We had problems with paying for the state filing which caused the entire process to freeze. It was some kind of computer compatibility issue, but transferring the data between computers was difficult and I had to redo part of my return due to lost data. Customer service over the phone couldn't fix the bugs, but they were willing to offer a downloadable version for the other computer which was helpful.
I have used many products over the years and feel most comfortable with TurboTax. There is a drop-off from Federal to state returns though. Confusion continues with the NJ Resident working in Manhattan cross-over. I never feel comfortable that this is completely accurate.
The TurboTax on-line community is a great feature and gets stronger every year. I used it several times this year and it was much more helpful than in the past.