I took OCP
Java SE 7
test today and I recieved 73%. I received 69% in Enthuware exam.
The resources I used are
1) Enthuware Exams
2) (Oracle Approved) Transcender Practice Exams
3) OCA/OCP Java SE 7 Programmer I & II Study Guide by Sierra and Bates.
4) Oracle Certified Professional Java SE 7 Programmer Exams by Ganesh and Sharma
All of those materials are equally useful in many ways. Enthuware exams are challenging and great. Kathy Sierra is a awesome writer!