My pair of 'Gen 2' GPTs has been functionally great so far, installed in G17s.
I liked the pull characteristics of the original GPT with dot connector more. The standard unmarked connector in the 'Gen 2' gives it an odd wall just before release, which I dislike.
I could replace the connector, but these now have a specific coating in the GPT. I might give the Overwatch NP3'ed Glock OEM Dot Connector a try. But man Im tired of messing around with triggers in a Glock. Too much fiddling and too little shooting. Tempted to just go back to OEM minus connectors across the board.