Evaluate the user experience of online shopping with price & time restraints.
You want to buy a birthday present for your 7-year old son. He likes Lego, so you are searching for a Lego set for him.
Find a Lego set which costs less than $30 and can be shipped to you till the end of next week.
Take a look at your shopping cart. You see that you could get 5% cashback on your order. Try to claim the cashback offer for this order.
When you are done, go back to your shopping cart and try to make the purchase. Stop on the payment confirmation page before entering any actual payment details.
How would you describe your experience? What can be improved?