The laptop dock is nicely made. The keyboard is roomy, and you can use the touch pad to navigate the screen. The Webtop interface is quite bare-bones, with only a launchpad and a few apps. It does have a full Firefox browser though.
The Webtop adapter is the cheapest Webtop accessory option. All it does is trigger the Webtop platform, while you will have to provide all the cables and external hardware yourself. With the Webtop adapter, you can only use a Bluetooth keyboard and mouse to control Webtop.