Disclaimer: This is my experience in the installation of the trigger kit. It worked well for me, but there is always a risk in modifying your own gun. Bring it to a gunsmith if you just want a nice trigger. If you enjoy understanding more about you gun, develop skills to diagnose and work on it, this is actually a good progress to go through yourself.
So if you are wondering if it is possible to install the Apex Forward Set Sear (FSS) Trigger Kit without any prior gunsmithing experience, I’m going to say yes. If you can be careful, understand instruction, decent with tools (e.g., using a punch, vice), then it should go relatively smooth. Prior to installing the trigger kit, I have zero experience in gunsmithing. The most I’ve done with my gun was simple cleaning and some stippling of the back strap. I have never even detail stripped my gun before thinking about installing the FSS trigger kit into my full size M&P9.