1st Trimester Genetic Testing?

Jasmine
I'm 8w6d and my OB offered me optional 1st Trimester Screening. It's a a simple blood draw & an ultrasound so it's non-invasive and it has to be completed by my 10th week, but  I'm not sure I want to do it. This isn't my first pregnancy, my son is 6yo. I opted out of all of the additional testing with him (No CVS or Amnio) and I'm not high risk whatsoever. Just curious as to what other Jan 2016 moms are doing.