When you talk about a product being usable, it means a lot of things. Easy to use, intuitive, well-designed, useful ....the list of adjectives goes on.

Driving to work today, I came across a very user-friendly feature in my car. I drive a Fiat Adventure which is like the hottest car around!! :) The sheer power, the way it makes me feel safe, especially on these crazy Indian roads and the comfort, all make me love it.

The steering wheel has a really cool adjustable lever, you pull the lever and move the steering up or down. Gives you control over your driving position...and for someone as tall as me, its a very useful feature.

Another cool thing is two lights inside the car, one near the rearview mirror and one in the center of the roof in the back of the car. So, when my kid wants to sit in his car seat in the back and read his book, the driver doesn't get distracted by the light.

I'm sure many cars have these features, but the ones that don't are obviously lacking.
Small things go a long way to enhance usability of any product....and better usability means satisfied customers!