I've used the program for many years, and appreciate the consistency year after year despite changes in the tax code. I've never had a significant problem.
The HR Block software is opaque - the precise categories for income entry are stacked in a way that makes double entry almost inevitable due to the labeling, invisible calculations and referencing between "interview" and forms. One will have to use the "whole form" viewer during review to assure there are no double entries or null-set sources of income, which will trigger errors.