i have the NY2 trigger in my G26 and i love it. i dont really notice much of a heavier trigger pull, although i'm sure that it is heavier. i'm a double action revolver shooter for a long time, so the NY2 trigger is still easier/lighter for me than a 15lb DA revolver triggger. i was uneasy about the trigger safety as well a long time ago when i first got my glock, so here is what i did. i installed the NY2 trigger. then to get over my "safety fear" was load the magazine up to full capacity, and leave the chamber empty but with the trigger cocked. meaning the mag was loaded, nothing under the striker but the trigger was fully foward ready to be fired. i carried mine for right at a month like this, knowing that if i had to use it i would have to rack the slide to put a round in the chamber. after a month of solid 18 hour a day concealed carry, the trigger hadnt moved or ever been accidently discharged. at that point i started carrying a round in the chamber knowing that the gun wouldnt go off unless i put my finger in the trigger guard and pulled the trigger. i'll be honest and tell you that the worry you have is all in your head. if you practice safe gun handling and keep the the triggerguard clear when holstering and unholstering you will never have an accidental discharge (which honestly should be called a negligent discharge).
hope this helps