Which ones have your friends done?
All those lights are basically made by the same company, just sold by different vendors on the internet. If you have time, you can search through the forum and find them.
Not trying to be mean, but it's not worth the time for me to search. Everyone in this thread has told you the same thing and we wouldn't all lie to you.
Here are my headlights, done the correct way, with a ton more visibility than those eBay ones.
Yukon Projector HID Retrofit
and this is why you don't want to cheap out. The cutoff of these lights and the output is beyond compare to those...