Just got one of these and pretty impressive light output for $14.99.
I also have a PB SuperFlash which I did a comparison test against each other swapping batteries between both and the Performance ViewPoint Flashpoint Ultra Taillight is noticeably brighter. Only slight issue is the PB has a nicer flash pattern, but the ViewPoint Flashpoint Ultra Taillight has a semi-transparent back that allows a little more of angular light emissions.