Thirded on @Blonde_Bunny reviews!
The best reviews for me contain the information I want to know about a product that isn’t in the description.
For lingerie, what are your measurements, not just size 12 but bra size, height, etc., what size you purchased and how it then fit. Stuff you can’t really tell from looking at a model photo. Feel of material and build quality.
Toys, how easy are they to use, how loud, rumbly or buzzy, any problems you came across or specific techniques you found that worked for you. Stuff like that.
For a whole plethora of wonderful reviews for inspiration have a look at @Ian_Chimp 's brilliant Review Hall of Fame thread. All the review of the month winners are in there to inspire you.