Great little holster. I find it works very well with a chest rig to keep everything above your waist.
My only complaint about the design of this holster is the fact that the pistol is horizontal. I prefer vertical shoulder holsters as the handgun will not fall out as easily. Also, the velcro holding the pistol in is a little unreliable, as mine has dropped a couple times when I was running.
Can fit a very wide range of pistols (I had a longslided glock in it and it worked fine)
Perfectly compatible with a chest rig
Magazine pouches on side are very handy and easy to use
Works with barrel extensions
Pistol is horizontal, not vertical. Although you can draw faster, it is less secure
Velcro holding handgun in is somewhat unreliable
The magazine pouches are aligned upside-down, so when you open them the magazine will drop. again, meant for getting it out faster, not securing it.