I would ask people to spend 2 minutes with the website/product and then answer: 1) To what extent you understand what this product is? (scale 1-7) 2) To what extent do you understand how you could use the product? (scale 1-7) 3.1) How probable is it that you will start using the product? (scale 1-7) 3.2) Please explain why/why not? (open ended).
Having people understanding what the product is and does and how and why they should use it is the first gate you need to pass.
Having people understanding what the product is and does and how and why they should use it is the first gate you need to pass.