So…<p>* Didn't realize I had the name and expiration field to enter as well. I thought it was just show casing the number entry. It wasn't until I came back here to HN to read comments that I realized that there was more to the demo.<p>* Tab order was wrong.<p>* 1Password couldn't fill in the data.<p>* No indicator telling me what credit cards you accept.<p>* CVV was hidden. There were several cases where I'd finished filling out the form, but couldn't change the CVV.<p>* Errors are not displayed. Try 10/10 expiration, and you are basically stuck. Without additional information, there is nothing to indicate anything is wrong.<p>* You can tab from the date to the hidden CVV and enter information there, but you don't see it. This is easily done because the automatic progression is inconsistent, so I've had to tab twice before getting to the year, and because it automatically moves me there, I end up on the CVV. This makes things really awkward.<p>* Overall, this was fairly confusing. I failed at entering the CC data the first time.<p>I spent 10 years handling CC processing, and basically living on the payment page. Keep the page clean, quick, and simple. You don't want to do anything confusing. Let them enter the CC data and move on. That fancy CC form will <i>NOT</i> sell a single thing. It will however <i>stop</i> people from paying. It does <i>nothing</i> to convert.<p>The more friction you place between a customer willing to pay and the actual transaction, the less chance you have of making a sale.