I just got the superflash yesterday and already got my eyes slightly dazzled by the brightness. It is by far the second brightest commercial taillight I know of. Dinotte being the first. Now I already have a seat flash with like 7 modes and that's my brightest flash before getting the superflash.
I'm trying to mount the superflash to the rear frame ' \ ' area the box discription and the moulding seem to force you ot mount it on the RIGHT side of the bike rather then the left side. I tried turning the mount around and it seems the ' \ ' is a bit too thick (I think) to mount the screw in. Also I use a rear rack so I'm concerned about something like 50% of the superflashes effectiveness cut off by the rack because it's being mounted so far into the racks ' /|\ ' area. I was thinking originally of mounting that on the ' /|\ ' area but found out that the mount was too big for it.
The superflash would make nice side left and right visiblity for sure. My original thought was to buy one and see how I liked it and if I liked it I'd get another and mount it facing to the rear with one on both sides of the ' /|\ ' rack.