Anyone try the Apex Tactical spring kit for the SD?

https://apextactical.com/store/produ...php?pid57.html

Apex kits for M&P's generally get high acclaim for improving M&P triggers; I have them in three M&Ps and think they are pretty good.

The SD kit looks pretty basic -- it seems to rely on replacement springs with less tension or "weight" to them to reduce the trigger pull (the M&P kits change the geometry of the sear). Cost is $19.95. I ordered two of them without reading a review, just on the basis of trusting other Apex Tactical products.

It will be a while before I can install these kits in my SDs. Any experiences with them? Opinions?