That's because you're familiar with your own product. It's not obvious to those people who are new to or not familiar with Reviewpost.
I used to have very few product reviews until I start hard coding a bright 'post a review' link at the end of the product description in every existing and new product. The number of review immediately shot up! The way I coded the links I was able to track if users were clicking on Reviewpost's dynamic link or my hard coded link... and each time I've gone back to look at the log the users have clicked on my hand coded link.
Instead of shooting people down please take this as constructive comment on how to further improve Reviewpost. If a lot of people are saying that the 'post a review' (or anything else) link isn't obvious then that's something that needs to be addressed. At the end of the day it'll make for a better product, a product that even more people will be happy with, happy to recommend which in turn means increased sales for you guys.
This person is right. The litmus test is not how easy you find it but how easy a new users finds it.
I would second the complaints of those who posted before me. Buttons or images are not needed, but I'm hoping for some VERY clear links in the update. Nether the "Upload Products" nor "Post A Review" link is very eye-catching as it is. I've had several members asking me how to upload products and post reviews, just because they haven't seen the links. I think some of the problem is that people are expecting the links to be much more visible, and miss them cause they don't start searching among the small letters.