To write a helpful review, I need to know:
What is the product? Is it a piece of musical equipment, a software program, a brand of clothing, or something else entirely?
What is its purpose? What is it designed to do?
What are its features? What makes it unique or different from similar products?
What are its pros and cons? What are its strengths and weaknesses?
Who is it best suited for? Who would benefit most from using this product?
What is your overall opinion of the product? Would you recommend it to others?
The more information you provide, the better and more informative my review will be.