I chose HR Block tax software primarily because of cost. The functionallity seems consistent with other tax software, at less cost. Federal Tax seemed fine. Did not have any problems with it. Filed a partial year resident MD tax return, and had 2 errors in the program that I discovered. The pension exclusion calculation was entered twice, the second erroneously entered for military/first responders (worksheet 13E). Had to override this to set to zero. Also, the part-year resident indicator at the top of the form was not populated correctly, and had to override the field. Purchase of a second state seemed quite pricey to me. Struggled with trying to get answers to these problems. There really is no resource that I found to report or document these problems and get a resolution.
Pros: Easy to prepare, Maximizes refund, Easy to import documents
I have used H&R Block Tax Preparation Software for quite a few years. It is the most easy to use, especially in importing prior year entries so you just have to enter the new numbers.