They are popular in some areas probably due to availability and marketing rather than performance. The ram-air shape relies on a steady wind to maintain its shape and is therefore susceptible to micro gusts and will invert and distort with very little provocation. For this reason Maui Kitesurfers overwhelmingly prefer Inflatable style kites. Ram-air design is converging with inflatable performance and may ultimately be the kite we prefer to use in extreme light air like on a mountain lake at high altitude. These days the kite board type you chose is usually determined by your previous boarding experience rather than the windrange in your local sailing area.
Beginners can use footstraps and slipper style bindings on bi-directional boards.
Directional boards come in so many production sizes and constructions that there is a board for every body type and size. Directional boards are usually preferred by people with a surfing or windsurfing background. Directional boards require you to change your feet when jibing. All boards should be used with a leash while learning, and when you use a leash, you should always use a helmet. If you want more information about equipment types and equipment selection you can download and read the Online Kitesurfing Handbook .