Excellent checker. The difference between the obvious faults - he corrects - and subtleties while it does offer. Some of course errors in complex sentences, but overall good in the analysis. Good integration in programs, even a little too much (like: it tries to be available in all programs on your PC). Very didactic in its suggestions. Not a bad option but I do not operate like aid crossword dict. rhymes, etc ... 4 stars because still almost 100. Note: in Word, it opens a new window with the corrections that are reflected in real time in the doc respecting the original layout (if it alerts a correction may alter the layout, for example in tables).