I don't want to add to this thread since its from 2006-7
A lot of advancements has come since those days and you can get a "premium" Hid kit at better prices. Of course its not going to be $30 but like you said yourself, you get what you pay for.
As for being less bright than halogen, something is seriously wrong with the HID kit, either try to get a refund or replacements. Working with manufacturer; I can tell you first hand that I have NEVER seen those HID kits before. The one they use in comparison are pretty crap already so if your kit is worst then i don't know. As I said before there are plenty of "premium" kits which you can find/read reviews on this forum and see which vendor you want to go with.
2007 MDX Sport + Tech
Mods: 5000k HID Fogs | Full LED Interior | OEM Wood Trim Shift Knob | OEM Sports Running Board | R5 CREE LED Reverse lamps | OEM All Season Weather Pads | LED Front markers