there is literally no such thing as an unbiased review. a review, by definition, is your thoughts and opinions about it, and it should be biased bc itโs your point of view. an objective review is not a review.
i like to include all the basic things in a review. product design, texture, price. but i also want to know about peopleโs experience with it. how it affected your skinโimmediate and long term, how you feel using it, whether the product meets its claims etc. the more opinions you include, the more natural and authentic it feels.
iโm terrible at taking photo but i think natural lights and textures help with them. i donโt think before-after photos are necessary. texture shoots are fun and helpful. play around with the packaging and your surroundings. macros are also nice to look at.