To run HID lights you need the Spyders else you will blind oncoming traffic, I think they are worth it for the price. Also the Spyders have a H1 bulb inside the projector so get the H1 hid kit. I would also recommend getting 4500-5000k for the best light output. I personally run 55w DDM 4500k in mine.
People complain about hot spots but for a headlight set costing a couple of hundred bucks don't expect BMW or Acura build quality. I've had mine for about a year and am quite pleased with them