I have 2 kits from eBay on mine aswell, no complaints so far. They are cheap chinese kits, they cost me 150€ so about £100 each one year ago and never had any problem with them, they come with complete harness, no modification to do. it is plug and play.
To be honest, the Hi beams are quite useless, the low beams with HID are has powerfull has standard hi beams and when I turn the hi beams on, every plate and road sign become so bright that it is nearly better to have them off.