I didn't actually install the trigger myself, but I had Sig install the short trigger and preform a trigger job on my P220.
I've got sm-med sized hands and I like it a lot. If you've got big hands or If all you do is shoot SA, I don't think you'll see a huge difference. But, with the short trigger, I can easily get around the trigger in the DA position without having to adjust my grip.
From what I understand, the installation isn't too difficult, so I'd give it a try.
-Red-