Installed my HIDs about an hour ago, and the different is literally night and day. The light (4300k) is just like daylight, and makes such a difference. I won't exaggerate and say it's 1000000000x better, but it really is 2-3x better than the sylvania I had previously. There's minimal hot spots, and I aimed it a tad low, to help reduce the glare until I order projectors. All in all, very good buy. Only problem is 1 of my ballasts makes a buzzing noise. Anyone else have that problem?