One more on the shooting sight bandwagon.
Never tried an SEI trigger job, but the ability to adjust, to me, is reassuring, as I found out, in that adjustment, that what I actually wanted wasn't necessarily what I thought I might have wanted. Specifically, for me, for that rifle, I kept the trigger pull on the higher side of the adjustable range, as I preferred the feel of both the first stage and the break that way.
In my SAI trigger housing, the adjustable trigger did not make my trigger equivalent to the 'pressure sensor' kind of feel of my modern bolt guns, but it was, for me, a vast improvement over the SAI 'National Match' trigger job that SAI provided. That being said, there is always variation in both process as well as preference, so somebody could get a trigger job from XYZ that they prefer over anything they get anywhere else, but the Shooting Sight trigger gives you the broadest spread of options I know of, where you get to figure out how you like it best, as opposed to somebody telling you what's best for you, which often, if not usually, isn't the case.
The fact that it allows you to examine the intricacies of how the trigger mechanism works, that the parts are built and hardened as they are, as opposed to being modified, and the faster hammer fall, are all bonus.
Be aware, that the speed hammer, being lighter, is designed to compensate for the lower mass/inertia that allows the quicker hammer fall, in terms of energy transfer into impact on the firing pin, by increasing the leverage of the hammer spring on the hammer (which also makes it faster).
There is no detriment to trigger pull at all in this arrangement, but you will notice that engagement/disengagement of the safety will require more force, as the safety has to push the hammer back just a little bit farther.
