So far I've played United Provinces, Great Britain, and France.... Of the three I found France the most challenging. I am still playing it through 1757. I couldn't play GB past 8 turns because I could see that it was going to be too easy and didn't want to just go through the process taking one province at a time.

There's still a lot of Beta testing to do in this game, let's pick out some more bugs and problems for free.