My husband and I have a split King-size bed made up of two adjustable XL twin beds. To get a traditional skirting onto one bed that you can walk around and try to pull it in to place -- triple the effort when you have two beds where the bases have been joined. 

Whomever created this design earns a reward -- and big bucks for such an intelligent design. It literally takes seconds to take off and put on new skirts -- particularly handy when removing them for the wash and simply putting them back into place.

Pros: Brilliant design - very fast to put on and take off - no lifting of mattress.
Cons: I wish they came in more colours as well as being packaged with bedding ensembles that include a skirt.