I also have the BAL-3ST which is the laydown smoke taillight on my 2010 SE Ultra with the tag light up. You simply will not find a brighter taillight. If cagers can't see you with this taillight they shouldn't have a license because they must be legally blind.
I also have mine set to the 2nd highest intensity (I figured the highest setting might take the paint of the front fender of the guys I ride with!). I also use the setting that makes the brake flash quickly three times before it goes into "steady-brake" mode.
Very good investment IMO.
My only question is when is this company going to release matching turn signal LED bulbs? I want to get rid of the stock incandescent turn signal bulbs however I was hoping to replace them with BALs if they ever release a direct oem replacement LED turn signal bulb. Anyone have any inside info on LED turn signal bulbs from BAL??