~ packaging: Was actually impressed on the packaging really, Unlike the auto parts store that puts them, in a cardboard and plastic packages, MarsAuto had them in sealed static proof baggies, it's same bags that a graphics cards would come in. That's a good start.
~build quality: ok so is what really matters now. the structure of these bulbs are great, the circuit boards and the soldered that holds them together are very good. doesn't look like cheap solder while holding up strong, I can say the same for the terminal wires too.
~ Lighting: these are bright! 6000 lumen LED's are bright and still well light in the day. on my 93 Geo Prizm, the orange parking lights are now a bright yellow during the day and night. they are very visible.
my only con is that this bulb has an exposed circuit, just make sure that the sockets on the lights have the gaskets on them still and you will have no problem if you don't it's easily fixed with Dielectric grease.
In my case, the splash guards in the wheel wells were removed for more room for the tire because I lowered it with coilovers and now my car sits 3 inches off the ground so that invites water to the lights on the bumper from the inside but so far the bulbs are holding up strong and they are NOT wet either.
Don't get me wrong these bulbs work perfect as a replacement just remember auto mechanic books always recommends using Dielectric grease, this does 3 things, waterproofs exposed circuits helps for a better connection while lubricating the bulb making it easier to remove or service later.
I Give this Product 5 stars because it's great, it doses its job for a great price and I would say this a high-quality product!