Just cleared it with 90%. I'll say the difficulty level of the real test is the same as that of the ICE test. Th real test needs more reading, but the wording is less ambiguous. Some experience in OO and J2EE will help to pass the test, but not necessary. Recommend to try the ICE test a few times and try to understand the theory behind the questions. Larman's and Martin's book a must, but no need to read them many times.
SCJP, SCJD, SCWCD, SCBCD, SCEA, IBM Certified Enterprise Developer, WebSphere Studio V5.0