I have used H&R Block tax preparation software and it's predecessor for years and found them easy to use, accurate and problem free. I used a competitor's software ONCE..had printer problems and bought H&R block to get the job done properly.
Two shortcomings this year that I haven't experienced before: (1) The required entry of "Amortizable Bond Premium Adjustment" is confusing and gives no instruction on how to determine that, and (2) the Accuracy Review at the end kept bringing up the same items for review, time after time, even though I had examined them and made the necessary verification. I finally moved on and left it.
I have used the H&R Block Deluxe Tax Preparation system for a number of years. It is easy to use and using the guided interview system there is very little that you need to know about the tax complexities as the system guides you through the entire process. One of the really neat systems provided is the ability to import taxing items directly from various brokerize facilities nearby elimination the requirement to manually enter individual taxing transactions. I really love that feature!
Pros: Easy to prepare, Easy to import documents, Fast