Craig wrote:
"I'm not sure which version of Visio I tried, but I personally didn't like it. I didn't find it intuitive"

Aaaghhh! that word - "intuitive" - don't get me started...

[rant]
Most times when people use "intuitive" in the context of (PC) software, they don't mean "intuitive" at all, but "works like other (Windows) stuff"

"familiar idiom" is not the same thing as "intuitive"!!!
[/rant]

However, having said all that, I will admit that the Visio idiom is somewhat unconventional - and yes, it does take a bit of getting used to.
But then I find the same to be true of most Windows CAD programs - they work the way (I presume) that an experienced CAD user would expect, rather than the way an experienced Windows user would expect; ie, it's a matter of experience not intuition!

In some ways it is surprising that MS haven't squeezed Visio into the Office mould...