I have a G43 and like it for what it is, easily concealable and light weight when the situation calls for it, My wife has a P938 and it is a nice pistol however maybe it's just the Bias in me but I prefer the Glock just because everything feels the same as my larger frame Glocks that I like to carry.
I know a couple of people that carry the Shield religiously and they really dig it, if you have the opportunity to shoot a few different ones that's always the best way, good luck!