Yeah, I am running HIDs with no issues. I have the 5000k I believe. I do not recall seeing any sticker on there saying "NO HID". That's pretty strange, I've never really felt the housing to check heat output either though. As far as light beam pattern, it's great. Like most other HID's that I've seen with a pretty solid cut-off line. Look
here to check out the beam pattern, it's pretty easy to see. Cut-off looks like this - ___/ so that you are not blinding the other drivers, but still illuminating the right-hand side of the road. I'm very happy with them, I'd almost say it's a must with these headlights.
I would run my lights and check to see how hot they are getting, but the car has been down for 2 months and is just now getting back together, so I don't have a battery or anything else plugged-in to check it out.