Depending on what you'll accept on your car will depend if the issues Iv had will concern you but some if my problems were...
Finished look after taking the lens off, colour match of outer and inners, half brake to full circle brake to quad brake, heat issues with wiring, resistance with wiring, bulb out warning light, colour warmth of inners, dark/light spots in inners, electronics, clean power supply to LED's etc etc. I didn't want an it'll do set up so kept going to what I have now. Find me on Instagram and Youtube under the same username as there is quite a lot of info there.
If your desperate for quad lights there is a chap on Facebook who is using my first method that'll take some money from you to do a version of the skyline mod.
Just saying --->
https://instagram.com/p/BBdRFlUL938/