That's the setup I use and I like it. A lot.
It is IMHO far superior than the sum of it's parts. I did not care for the "-" connecter by it's self at all. It was the first time that the trigger felt legitimately "mushy". But the addition of the NY1 spring got rid of all the mushiness, and greatly improved things over all.
Polishing contact surfaces is kind of a no-brainer no matter what the rest of your set up is - or what gun you're carrying for that matter.
Also, having a stiffer take up - for a carry gun - would make it more difficult to inadvertently pull the trigger in a adrenaline-laced SD situation, and make it that much harder for any foreign object that winds up in the trigger guard to cause a UD.
Finally, I spent the extra $3-4 to get the OEM "-" connecter, so it still is technically "stock", in that every part in my gun was made by Glock.
If you don't wind up liking it, that's your prerogative, but I too liked the out-of-the-box trigger, and I still like this set up better.
But I'll echo what Constantine said. Where it really shines is shooting, not dry-firing.
You do have to either keep the trigger pulled, or pull it a second time during take-down as the NY1 spring pushes it forward part way after you pull it. But you get used to that pretty quick.
And the best part is, that with the prices of the parts - even if you do hate it you're only out like $25.