The post shopping cart offer added an item I did not agree to purchasing, and it took several emails to have it refunded. The checkout page felt a little scammy with the offer that popped up (and it got worse when I realized the additional item that appeared out of nowhere and then was told by the customer service rep that I added it myself when I did not - I'm sure others are experiencing the same error, so not believing me and looking into it was frustrating).