After much research, I settled on the Trijicon HD night sights (orange front post) for my daily carry Glock 19. Bottom line up front: these are some of the best sights I have used on a handgun. They are not without their limitations, and not for everyone, but for me and my needs, they are just about perfect. What do you get in the box? A rear and front sight, all metal construction, of the same height. Rear sight is blacked out with 2 tritium lamps, front sight is a tritium lamp surrounded by orange or yellow phosphorescent paint. First and foremost, I am traditionally not a fan of tritium-filled night sights. I am, generally speaking, a fiber-optic kind of guy. Most of my training and time behind tritium pistol sights have shown me that their uses are limited. Generally, they only glow in very dark environments -- and in those environments, target identification is paramount, thus the use of a hand-held or pistol-mounted light -- thus, your night sights go away because the area is too bright. It's an ultimate catch 22. Fiber optic sights have always circumvented this problem. How did the Trijicon HDs change my mind on tritium? Ultimately, it boils down to a handful of reasons. 1) the tritium lamps here in the rear sight are very bright - enough so that they glow in-doors even in the late afternoon. Much brighter and easier to pick up than other tritium lamps I have seen. 2) The large orange dot on the front sight is highly visible in the day time, and phosphorescent enough that it shines/ reflects somewhat when using a light in total darkness. This is excellent, and helps you acquire a sight picture in many lighting conditions. Why these sights over a different name brand? A handful of very clever design decisions give these sights an edge over the competition and worth the high asking-price. The tritium rear sights all but disappear in day-time light - acting as blacked-out rear sights. This makes the sight picture less busy and acquiring the orange front post very fast under stress. The back of the rear sight is cross-hached, making it less likely that the rear sight will attract glare in the sunlight, and on a Glock, the Trijicon HD's rear-sight extends to the very back of the slide (unlike the stock sight), improving the sight radius slightly. Furthermore, the front-end of the rear sight is U-shaped with a slight hook, aiding in one-handed manipulation of the handgun such as racking the slide off of a belt buckle, etc. Lastly, the notch on the rear sight is notched in a U shape rather than a traditional squared shape. This aids in front-sight acquisition and fits the orange (or yellow, depending on model ordered) front sight perfectly. Why might these sights not be for you? The sights seems designed more toward speed than precision. The bright orange dot is very easy to keep track of during follow-up shots and rapid strings of fire. If you're looking for sights that will help you hit a silver dollar at 25 yards, you'll want to look elsewhere (much cheaper sights are available for that purpose). If you're looking for sights that will help you shave a few fractions of a second off your ability to draw and put 5 rounds into an 8-inch plate at 7 yards, these are what you've been looking for. Some room for improvement? First up, the tritium on the front and rear sights is all the same color- green. Although the front sight is surrounded by orange color, this can be hard to see in the dark. Having green rear and orange front tritium would be nice. Next, the paint on the front sight does glow when exposed to light... but not nearly long enough, and needs to be exposed to a lot of light before it starts giving off it's own light. If it could be "charged" with a flashlight and last a few hours, that would be nice. If it could glow for a few minutes after just being exposed to a street light at night, that would be even better. Last - the rear sight has some sharp points at the top of the notches. It has yet to interfere with my draw, poke my skin, or anything of the such after thousands of draws, but it's there, and it might be a snag hazard depending on your concealment garment. Over all - the sights changed my opinion on tritium sights. These are useful and visible in a wide variety of lighting conditions, indoors and outdoors, and have some very well-thought out design choices to help give them an edge. For a self-defense minded shooter, these are hard to beat.