i had one and it was good, i built it myself and scored pretty darn high, i would suggest getting PMS cards from a 378 and learning the ins and outs of the boiler system. All the questions they ask on the EM1 EOCT are very very topical to the expertese you need if you are put onboard a cutter. i would definately suggest for your best interest you don't try a short cut around the learning.
I built my study guide by failing the EOCT 3 times.... best damn study guide out there if you ask me. What i'm saying is simple. If you dont pass the first time youll be even smarter the second time, so RTFM