I've tried Watson; I didn't find it particularly useful, but I did think that the visualisation and interface was superb.
Most of my playing with it was focussed on the 'Explore' parts, not the 'Predict'/'Assemble'/'Social Media' functions. I was disappointed in the level of documentation for some stuff (you have to look quite hard to find a definition of 'summary' - on my data, it just sums the column, for example).
I was also disappointed that you can't fit distributions or access the distributions that Watson fits, and at the lack of statistics (you can't get at skewness, kurtosis and so on).
RetractionWatch, who are well-respected in the scientific community, has seven posts discussing his work (http://retractionwatch.com/category/by-author/gilles-seralin...). I won't go into the detail of the retracted article, its subsequent republishing without peer review, or his various conflicts of interest around his books or the funding of his group by 'pharma' companies selling plant-based homeopathic products claiming to be able to 'detoxify' Roundup residues (there's some detail on this in his Wikipedia entry - https://en.wikipedia.org/wiki/Gilles-%C3%89ric_S%C3%A9ralini)
With respect to his 'court cases' - he won a defamation case against a journalist writing for a French magazine that had accused him of fraud and forgery. Incredibly few critics of Seralini have accused him of fraud; the court decision makes no statement as to the merit of what is the serious criticism of Seralini's work (in terms of the statistics, methods and analysis employed).
Regarding the German Federation of Scientists - he was awarded a 'whistleblower' award, not one for scientific merit. The jury/committee that awarded him this had a CRIIGEN board member (his host institution) and public supporter of Seralini as a member; there is not, as far as I can see, any information to suggest that she recused herself for this decision. The other scientist on the jury is a well-respected metrologist; all other members of the jury are legal professionals. For the sake of balance, the full decision of that jury is listed here - http://neu.vdw-ev.de/wp-content/uploads/2015/10/Full-Reasoni...
On a personal note though - Seralini has several anti-GMO and anti-glyphosate books, releases papers in concert with documentaries, and appears to believe in 'detoxification' and homeopathic plant-based treatments in order to 'detoxify' Roundup residues. This behaviour and these views place him quite outside the usual behaviour of a scientist - it's simply not done that you write a paper and time it for an accompanying book launch and documentary release.
Most of my playing with it was focussed on the 'Explore' parts, not the 'Predict'/'Assemble'/'Social Media' functions. I was disappointed in the level of documentation for some stuff (you have to look quite hard to find a definition of 'summary' - on my data, it just sums the column, for example).
I was also disappointed that you can't fit distributions or access the distributions that Watson fits, and at the lack of statistics (you can't get at skewness, kurtosis and so on).