This is what my wife's reuse notice said:
"U.S. Citizenship and Immigration Services (USCIS) has received your form and is currently processing your application, petition, or request. This notice informs you that USCIS is able to reuse your previously captured fingerprints and other biometrics. USCIS will run the same security checks and use your biometric data as in the past; however, it is not necessary for you to appear at a USCIS Application Support Center (ASC) for a biometrics appointment. The biometrics fee will not be refunded. USCIS is continuing to process your application, petition, or request. USCIS will contact you in writing if any additional information is necessary to resolve your case. This notice is not an approval of your pending application, petition, or request."