How do you get an honest review?
Some people aren’t inclined to review things, unless you kindly ask them to leave one, but they will do if they’re sold on the product.
If the product fulfill their needs, if it improves their lives substantially, then a review will be something natural.
If your product is “normal”, if it can easily replaced, if there are similar items with similar values, then don’t expect a review unless you find a workflow to ask for them.
But if the product is worth it, if it has a soul, chances are you’ll get one, sooner or later.