I’ll try and put a whole template in:
<small>by @username, Date of Review
[Product Name](Product Link)</small>
<div align="center">
<big>Review Title</big>
</div>
Review Text Review Text Review Text Review Text Review Text Review Text Review Text Review Text Review Text Review Text Review Text Review Text Review Text Review Text Review Text Review Text Review Text Review Text Review Text Review Text Review Text
> **Overall Rating:** ? out of 5 stars
>
> **Pros:**
>
> **Cons:**
>
> **Bottom Line:**
And then just copy and paste the bits of the review from the product page into the right places. 
Edit: After a little tweak, it’s now possible to copy the above and paste it into your reply window to create a base-template.