If you want to introduce/train a new shooter the 5.7 is a great gun.
I helped a woman friend and she hated the .38 but loved the 5.7. I weapon she would like to train with and continue to use too.
I like to use a .22 LR in an accurate semi-auto for training new shooters. I would like to try using that combination with a gun muffler (suppressor), but have not done so yet.