I passed too! Took it today, July 25th, and got 108/150.... which is not really the best, but passing!
I used only two tools, Mark Boswells youtube videos, which were great, and the ENA exam practice questions, many of which were very similar to the actual test.
The hardest parts I thought were on electrolyte type things, what causes hypo/hyper everything, and s/s of basically all those conditions.
Good Luck everyone!
Thanks Mark Boswell, you are a great aide to CEN test takers world (USA) wide!
Is the CEN only for US practice?