Tips on reviewing affiliate products

Any tips on how to write good review blog posts for affiliate products? I run a couple of blogs, monetized by Adsense, but I feel I could make a lot more on affiliate products. Any tips?

I am thinking something in this fashion:

- Introduction to problem

- What is the product, why is it different?

- Pros

- Cons

- Conclusion/call to action ...

I feel like alot of salesletter copywriting will be too much for a blog post. Selling the product too hard will only make people question my credibility and damage reputation I guess.



Any insights?