Panic's Checkout Form

Just bought the "Transmit 4":http://panic.com/transmit upgrade. Having used Transmit 3 for several years, the UI improvements are a big deal. It seems like some of the nit-picky stuff irked me was fixed and overall the app feels worth the $19 upgrade.

Panic has always been detailed oriented. Their site has always been easy to use and a pleasure to navigate. One thing that caught my eye while purchasing Transmit 4 was the checkout button:

!/sites/nickvahalik.com/files/transmit_checkout_button_1.png!

My only complaint after having gone through the process was that this button is mislabeled. But it looks like a normal button, right? Well, it's not. Because as you fill out the form:

!/sites/nickvahalik.com/files/transmit_checkout_first_field.png!

The button transforms:

!/sites/nickvahalik.com/files/transmit_checkout_button_2.png!

Continue filling out the form:

!/sites/nickvahalik.com/files/transmit_checkout_form.png!

And it fills out more.

!/sites/nickvahalik.com/files/transmit_checkout_button_4.png!

Until you've filled out every required field:

!/sites/nickvahalik.com/files/transmit_checkout_button_3.png!

Very cool!