I have a SR9 and I love it.
When it has brand new I was a bit shocked by the heavy trigger, but with polishing of the internals and some shooting, it's much better now.
I've read on the Rugerforum that it needs about 500 rounds to smooth things and that seems right and if yoy do some shooting before the polishing, it's easy to see whick parts/spots need some attention.
I don't really like the stock sights, but the Ameriglo's that I'm currently running are great.
BTW, Ruger strongly advises not to cut/trim the striker spring, but leaving it cocked for a few days also lightens your trigger pull.