How difficult is the CSWA exam in comparison to the sample exam, and how much more difficult is CSWP over CSWA?

So I've been using Solidworks for work for a little over a year now, basically self taught from watching various tutorials. I'm getting much better/faster with SW, but due to time constraints at work, I've often opted for the Long Route Around problems, because I know the long route, and don't have time to try and figure the shorter route. It was the primary reason I wanted the student version, so I could start learning the features I really don't get to use too much at work. Finding out CSWA/CSWP exam codes were included was a nice bonus...

Last year, my 'personal goals' section of my review included becoming more proficient in SW. This year it's to earn my CSWA. My boss was pretty happy with the idea.

Anyways, when I reviewed the list of subjects covered during the CSWA exam, it looked like I'm good/familiar with 60% of the list, and I have a few areas I need work on before I take the Exam (I'm not planning on trying for at least 3 months), but I'm really nervous on just how much more difficult the actual test is. I plan on trying the sample exam this weekend when I have some time to devote to it, just to get a better idea of where I actually am skillwise. Also are there any good prep sites for the CSWA exam?