I have been using H&R Block software for over fifteen yrs. now. I have never had any issue with completed tax return. My plans are to continue for as long as I file a tax return.
I have used HR block software several times in the past. It's a great software and very easy to navigate. The interview questions are simple to follow and it has usuful links when you need help. Definitely recommend.
The software allows you to look at the actually IRS forms and worksheets that are filled when answering questions in the user interface portion. This access to the documents helps if you are wanting to know how some figures are being calculated.
Pros: Easy to prepare, Maximizes refund, Easy to import documents, Fast