Biggest Surprise?

[Corey Shields]

Hello all. I'm a beginner who is almost feeling comfortable enough (educated/prepared) to take my first shot at a rehab. I would like to ask you all a question: think back to your first REI project. Although you probably learned most everything you thought you should know, what came as the biggest surprise? Meaning, what happened that you totally didn't expect to be so difficult? Or perhaps the surprise could have been that some aspect of the project was EASIER than you anticipated. Any replies are appreciated. Thank you all.