The Galco Executive shoulder holster is the only leather shoulder holster I have ever purchsed that keeps the firearm tucked up underneath the armpit for better concealment and stability. However, the strap does necessitate the use of a collared shirt to keep from rubbing against your neck.
Pros: Quality
Cons: Requires a collared shirt for comfort
This review was written in the old system and had content requirements that are different than reviews written today.