Finally got around to testing the magnaported 365xl. I am happy with it- takes the edge off recoil but doesn't affect reliability/ejection using factory springs, ejection remains perfect.
Would I do it again? Yes.
Did it make a CRAZY difference in recoil like other ported guns I have or have shot? No.
Would I carry it? Hell yes.
Overall, I have no complaints and I do think it works well. It makes the gun feel closer to a non ported G19 than a thin subcompact like a G43.