I recently purchased this program as a download from ChessOK (for about $30) because I had been reading about Aquarium’s IDeA analysis function which I thought would be quite handy. Unfortunately the program has proven to be quite disappointing. See my Blog posts for Sunday, May 6 and Thursday May 10 on my regular Blog for details.
If you are looking for a chess program, my recommendation is to buy Fritz and download the free Houdini 1.5 engine.
UPDATE: It's been over a month and I still haven't figured out how to use this program! In the past when I installed other programs like Shredder and Fritz, I was up and running in minutes...not weeks!