So far, it's outstanding.
I am 44 and have been a wargamer since age 10. One of my favorite genres is WW2 Grand Strategy. Some of my favorites have included 3R, A3R, AWAW, TK2, WiF, and AETO/APTO. They are all decent and each one shines in it's own way, and each have various shortcomings. I have always said that the perfect game would be a combo of AWAW+AETO+WiF+TK2 and then put it on computer.
My favorite computer wargame in this category is: none, they all suck (with the following caveat for TOAW below). Until now.
I will add TOAW in there for the following reason: I once took the Europe Aflame scenario and completely built the European Theater. Obviously, TOAW isn't built to do that but I did it and it was freakin awesome. It was huge and had hundreds and hundreds of events to control the strategic warfare and production. Dozens upon dozens of theater options. Probably had the most accurate corps level OOB ever assembled. I spent years on it. I was most proud of options I created for hypotheticals such as France fighting on. I must have read 15 books just about French collapse and resistance. In all honesty, I'm probably an expert on the subject lol. I also took great pride in the Italian OOB (I fell in love with the Italian Navy and they remain by favorite combatant of WW2). Utterly fascinating. Anyhow, it was a labor of love and of course it doesn't really work--you had to manually trigger some events and so forth.
And now I have Warplan and I'm---so far--very happy with it.
I'm going to use this thread for myself as a sort of checklist of observations and impressions. I plan to update it as I go.