One page or multiple for cpa offer?

Hello warriors,

I have found a cpa offer which seems to have decent conversion (from network's stats at least) and pays well, this is also a rather heavily promoted product so I know people are making money with it. So I figured I should give it a try.

My dilema now is, do I go with a long'ish one page review/whatever, or do I go with multiple pages/articles? Obviously testing is the only way to find out for sure. But in your experience, what works best? One page site with perhaps articles in the back ground (no links on the main page, but still there for seo) or a bunch of articles/reviews each focusing on a smaller aspect of the benefits, problems it solves and concerns about the product?

I can't seem to decide On one hand it seems like 1 page sales pages are the way to go for something like this. But then a larger site with numerous articles/reviews might allow visitors to learn more about the product thus resulting in a better click through and conversion.

Also, if going with multiple pages, if I am using wordpress, is it better to go with "pages" or "posts" as far as seo is concerned?