I bought the whole kit to do the electric windows and the steering wheel controls, but I never fitted those as I wasn't happy with the centre console. All I did was replace the LED's which were already there, and the blue ones weren't bright enough to be able to see the speedo properly either. Oddjob I think on AOC does a full dash conversion which uses a lot more LED's and they are properly soldered in in place.
As you can see from the speedo, there was also hot spots present where the LEDs sat, which I also wasn't happy with.