With Cookie Confirm you can easily comply to the EU cookie law. It's developed with usability, functionality and good graphics in mind.
Responsive CSS3 Template
We've developed this extension with usability in the back of our head. You can see this at the responsive CSS3 template which also works great with mobile devices and tablets. Not only the banner is responsive, but also the placeholders and pop-up. The image below is not responsive, delete your cookies to see the responsive demo at this website.
After making a choice the visitor can edit their settings by clicking the triangle in the bottom corner. This will open a pop-up with the privacy settings. You can hover the image below to see the image which is shown when the visitor accepted cookies.