• They will create sound barrier between the basement and the rest of the house.
•  Will provide easy access to pipes and wires running up in the first level floor joists.
•  If later on you decide to install new wiring
  
  , such as telephone, computer, or electrical wiring, you can easily remove the dropped ceiling tiles.

Disadvantages

• You will lose 3-5 inches of ceiling height
• Most people just don't like the way they look