Not meant to scare you or anyone else. Automation is great but also leads us all down a path to lose the skills we all worked so hard to gain.. handfly as much as possible, don't use the auto brakes (if 175 has them), fly at least one approach per trip with auto throttles off (if you're going to do this, brief your captain ahead of time that you would like to do it). Just don't get lured down the path that just because the airplane can do something, that it should.

Oh and also do not forget how to descent plan- vnav is a wonderful tool but it will go belly up on you and remembering the basics like the 3:1 rule will save you. Do not let the airplane take away your ability to be a pilot..