Fot the last several days I've been carrying my gen2 glock 20 again. I have a sidearmor iwb holster with I think 15 degree cant from almost 20 years ago. Used to carry behind the hip now I carry in front. Draw is a little strange but it puts the grip into my body just right. It's currently much easier to "make" my spare mag than the pistol (mom got the mag when she hugged me, not the pistol though). I carry it just fine in shorts and tshirt. I should probably try to use a diff mag carrier.
I use my shield with a foxtrot concealment tuckable holster on Sunday mornings, same carry location, 2 spare mags, pouch fits in my back pocket. I'll try to replace the g20 with my hk usp 40 compact v1 when it gets its new holster. I do need to train more to get that double action pull down.
Both the shield and g20 shoot very naturally for me.