when having dropdown focused, I cannot make the dropdown list open using keyboard. Standard <select> form field uses space key to achieve this.
When selecting list item, up and down arrows, enter and ESC (when the list is open) works, but home, end, page up and down keystrokes select different item but also scrolls the whole page. Tested it on your demo page here: http://demos.telerik.com/kendo-ui/dropdownlist/index
Other keystrokes seems to work fine.