Bought this kit just few weeks back. Was driving daily with them on. Finally, can share my experience with you.
First things first - installation. You don't need to mind polarity unlike with cheap and short lasting EBay ones. Plug in either way and you are set. Also, you can leave your lights switch on because they don't get hot. That way you can finish installation knowing it lights up and placing correctly into the lamp. Big plus compared to ordinary bulbs that get very hot.
Some people mentioned the need to flex contacts etc. Nonsense. This only happens to cars that have worn out fittings. Or that have wrecked fittings due to the fact that previously cheap LEDs were fitted that were not made up to standard and too thick.
After installing, check your new headlights look in the dim lighting. Superb. Professional looking, no cheap/boy racer feel to the headlights. As if your car got a "facelift". Can't express myself enough how happy I was and still am with the new look. Also, these lights are at least twice as bright as ordinary quality bulbs. Big big plus. Not road legal? Only because it takes ages for these things to be accepted. As legal as new vehicles with factory fitted LEDs.
Last but not least - longevity. Most LEDs I had in few weeks developed defects, changed color, even stopped working. Osram ones were taken out to ensure they are not overheating and doing the same. As new. Could not believe it. I was so used to overheated and failing LEDs that this was a complete eye opener to me.
All in all without rattling too much best product I have ever used that comes in this type. Sleek, quality feel and strong performance. Add decent lifetime and it is a clear winner. Next step is changing reg plate and interior bulbs with these. Recommend to a friend.