I got one earlier this year. Messed around with the JPoint reddot sight for a while, but really didn't care for it.
I've shot 158gr SWCs (plain old bevel based, hard, volume cast) with 3.8gr of HP38 in .357 Mag cases. This load shoots pretty good, and should be in the cowboy action load category. My best load is 15.0gr of A2400 under a 158gr Horn XTPHP with new Starline cases and Federal standard (not mag) primers. This load is more accurate than I am.
I've also tried 125gr Horn and Speer, 170gr Keith's, and 180gr Horn XTPs. I didn't spend a lot of time trying to develop a load for any of these, and they all shot OK (say less than or equal to 2" at 25 yds). I'm sure with some additional work, I could optimize loads with any of these bullets. Of the bunch, the 125s appeared to be the most finicky.
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Oh, one final thought -- I wouldn't bother with the trigger over travel screw option.
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Paul