holster with a button release?

Hi guys, I got a holster for my pistol. It is my first holster. I didn't know there's a mechanism that locks the pistol in place in the holster. There's a big flat button you gotta press to release the pistol. What's your opinion on this? Any of you guys have the same set up? Thanks.px4 holsteramazon link via /r/CCW http://bit.ly/2rXP9Lf