I have been using the blue one out of JEGS. This is also the one that Ehrenberg pushes on his e-bay store. I like it. Have used it on three cars now, I think it is better than the orange box at start and idle. Have had no problems with it.

I mounted one behind the front passenger headlight on my Charger, worried about heat. But the other two have been on the firewall and have done fine.

You do need a ballast with it. I also run an Accel 8140 coil (repainted black) which seems like a good match for it.

Note...this is a street driven car