My IOE was super easy, just make sure to relax, have fun, and ask a lot of questions...they are just there to show you the ropes and to make sure you can take off and land safely. Actually the first few trips I did off IOE were much harder, since no one will be there to spoon feed you.
Again, all my check airmen were really cool, and didn't ask me any questions while we were flying. It was just another trip for them....they didn't have any issues answering my million questions though!
The hardest part of IOE was landing for me...for the past ten years I was use to landing in a crosswind using the "wing low" method...obviously can't land that way in a jet or you could accidentally flame out an engine, and also power adjustments I found to be much more touchy than a 172...after a few landings it was cake though.
Good luck! You'll have a great time.