Paypal IPN and Express Checkout

[justjoshenu]

Are there any advantages to using one or the other?

If it saves time, it seem slike PayPal Express is the best option.

Am I missing something?

It seems to me that I would need both....
The reason being:

If i am using PayPal Express only, and someone creates their account to check out the regular way, once their order is confirmed on my site and passed to paypal, the only fields paypal fills in are the email field where -as PayPal IPN fills in all of the fields.

If i was a customer, i would not want to enter my information twice, once on the site, then once for paypal.

If they choose the express method, then all is fine and dandy. But if they dont....

am i missing something? should my cart be passing the zen cart account information to paypal with paypal express (paypal ipn does)