I passed with just using the NCEES sample questions. The October exam seemed a little harder than the practice test as it was a lot of conceptual stuff, but wasn't unbearable. I went through the NCEES sample exam 3 times and had a good reference binder.
Congrats! I'm considering taking the LEED Green Associate exam here shortly then taking the LEED AP. I'm with the others, what exam prep material was good to look at?