I use the Air Marshall version oh the Kangaroo Carry for my G 43 or G19. Very comfortable and can be worn right against the skin on very warm days. But expect the pistol to be sweaty if you are exerting yourself in warm weather.
I also have an Alien Gear shape shifter shoulder holster for colder weather when I know I won't be taking my coat off. It's good heavy leather but under a coat you might as well just put it on you hip if the coat is long enough.
Pros and cons, for my use, the Kangaroo is more comfortable and far less expensive than the Alien Gear.
But the Kangaroo only carries the pistol in a vertical position where the AG is adjustable.
The Kangaroo Air Marshall version I have holds either my G19 or My G 43, the AG requires different kydex shells for different pistols so more expense.
In the end, I've had the AG for 2 years and just tried the Kangaroo this year and go to it because I wear it under lighter clothing. Even riding my bikes both pedal and motorcycle. I still use the AG for on the hip or IWB use but that tends to just in colder weather now when I wear more clothing.
As always, YMMV