I think it's one of the best holsters I've ever had. It holds the pistol high & tight, it has good retention, and it's very comfortable.
When you get it, you'll notice it seems to drag a bit, or even seem too tight. Just spray the inside of the holster with plain (no additives like teflon,etc) silicone spray. You want to wet the entire inside of the holster. Then, using a paper towel or rag, remove all of the liquid. The inside of the holster should be bone dry when you're finished. You will be shocked at the difference now when you insert your Glock.