They are very high quality. About as good as anything I've seen from the aftermarket vendors.
The color can be changed with the controller to kind of light aqua blue or bluish green. With the blue filtered overlays (it's just stickers), it's truly blue (without the hint of aqua color).
Installation is not much fun at all. There was no way on earth to put my set on without removing the needles. If you have to do that, read how it's done, it saved my ass since I read about it first. I ended up using the stock gauge overlays just with the lighting sheets from Speed Hut. I chose to do that because the Speed hut gauges do not show up the red marks well at all, for the redline and coolant red zones. The stock overlays have a light diffusion pattern on the back of them for the light bulbs, so that needs to be sanded off with fine sandpaper (like 1500 grit) so it lights up even everywhere.