The library offers a high-level of usability with features like:
- tooltip labels displaying info on hovered items
- zooming on a specific part of the chart
- text rotation on labels for a better readability
Highcharts has an admirable effort in browser compatibility. For standard browsers it uses the canvas element and in some cases SVG for the graphics rendering. In Internet Explorer, graphics are drawn using VML. Besides all major browsers, it works in iPhone & IE6.
The library is offered for free to be used in personal/non-commercial projects & requires a license for commercial ones.