I am very positive about the buttons. They are great ergonomically because they are different sizes and shapes. One of the most important ergonomic considerations on car stereos is how to mold and shape the controls so you can work them without looking at the device physically -- this is very important in a car. This is one the great failings of the credit card remote because all the buttons are the same and could be dangerous to use while the vehicle is in motion. If you examine a lot of the popular aftermarket car stereos out there, you'll find that even though some of them have a dozen buttons, every one of them is shaped, positioned and oriented so that a hand feeling around can tell one from another. Some of the worst stereos out there have simply a row of identical buttons...

The mark 1 is ok ergonomically with its 4 buttons orientation-wise, but as soon as you get into the remote, uh oh!

Calvin