Yeah I've installed those too, except for the extra little blue light type. Thats a whole heck of a lot of work to replace a bulb in a bulb. The bulb sockets included there are crap too.
These lights were in my BIL"S Porsche for a couple years and they still work great!
They are about ten years old believe it or not, and yes redfish, they are a pain in the rear to change a bulb and they don't give you much wiring to work with near the light itself because they have about three short pigtails and a bulky square relay too close to the light, but the finished results are worth it.
He has ran these bulbs for years with ZERO issues so hopefully they will last me a long time too, and I do have two spare bulbs still in the box.
The other thing I like about these lights is that they don't blind other drivers if you adjust them right, but I don't plan on doing too much driving at night with my car anyways.
It was one of those cool factor things that I just had to do.