Health Cabin is a brilliant vendor, they have excellent customer service, they answer their emails promptly, they will try their absolute best to help you if a problem arises.
However, and this goes for All vendors located in China, they have no control of the item/ package once it has left their premises, if you opt to use China Mail your items will take a long time to arrive. When it is busy /peak or festive periods it will take even longer to arrive, if you choose China Mail do so before Chinese New Year (10 Feb 2013).
Otherwise, spare yourself the heartache and worry and use DHL, spread the postage cost over the number of items you are purchasing and it still works out cheaper than waiting weeks for your items to arrive.