Only type of review I have done so far (all two of them, but several more in the works). I have always used "templated" writing in my normal writing, so the extended template feels much more comfortable to me. It takes a bit to avoid heavy redundancy, but the structure helps make sure that you hit every single aspect of a review.
Have not tried the other systems yet, but I take a long time to get a written piece out. Perfectionism wins over expediency with me, especially with many other presentation and writing commitments in my life. So, I am not sure the free items or sponsored reviews would be the best for me given the timelines involved.