Well, I had a conversion on mine. It was aimed properly, but I still got constant high beam flashes at night. I personally experienced and agree with the study that stated there appears to be more light close up, but the distance vision wasn't as good I believe it's an optical illusion making you perceive you can see better, when, in fact,'it's worse at distance. I've gone back to an adjure reflector with a high end bulb, and the HID conversion bulb is sitting in my parts bin. The only way I, personally, would ever go back to HID, is if it was a kit, complete with replacement reflector.
Btw, I've yet to see a conversion without reflector that gives an adequate high beam at all.