I have one of those that came with a Glock I picked up from somewhere.
I do not like it, and here's why.
The leather is soft, far softer than a properly boned handmade holster should be. As a result, the retention is not all that could be wished (though it retains adequately), it flexes on the belt too much for my taste, and reholstering is a challenge because the holster mouth tends to collapse.
Aside from that, I prefer holsters with "sweat shields." They help keep your shirt out of the holster when practicing, and provide an additional measure of comfort / clothing protection from abrasion and lubricants.
I also don't care for the holsters that let the muzzle stick out of the bottom. Sometimes the front sight will catch on the edge of the holster when drawing. Plus, the muzzle of the gun can get beat up and scratched, and the front sight can potentially be damaged especially if you're getting in and out of cars several times a day.
I also have the Blackhawk CQC and much prefer it, though it's an IWB design. If the leather were stiffer, it would be pretty close to perfect.