I'm a 43 year old, daily exercise, lap swimmer.  I find most other suits are either too big or too "small".  Dolfin Baggies are small enough to form to the body and reduce drag, but large enough to cover me from my waist "on down".  
I don't wash my suits.  Just a rinse in the shower four days a week.  My Dolfin Baggies last about a year.