Anyone using this?
I've downloaded the trial version and am pretty impressed. I had Gnu but moved to Windows 8 and it doesn't seem to work properly.
Extreme seems to have all the features and more and has a pretty good record from what I can see. I just want to use it to learn and do some analysis of my play, but would be interested in what some of the experts think.
I made the switch to XG about a year ago and basically haven't looked back. Definitely worth the $50.
It's faster and stronger than gnu, especially if you have a dual-core cpu - gnu's threading model doesn't allow it to utilize more than one cpu simultaneously while XG's does. And XG Roller++ will analyze a position in a few seconds more accurately than gnu 2-ply rollout (which takes several minutes )
I put all my FIBS matches into the XG database and it gives me a running total of my progress (or lack thereof) - this is pretty painless, just a click "yes" to add the match once it's analyzed, and then there are numerous reports you can view. gnu is probably more flexible in this regard since it uses a PostgreSQL database to store the data, which in theory allows you to build your own queries assuming you know SQL. I'm quite conversant with SQL, but never could quite get gnu to do what I wanted, while with XG anybody can easily track their progress.
I don't mean to dump on gnu, but XG just does most things better. Of course, I still keep gnu around and tend to use it for playing (as opposed to analyzing). I think gnu looks better, and the look is more customizable, but XG is good enough in this regard.