While several CDMA Sense 3.6/ICS 4.0.3 ROMs have been springing up in the past few days, most have been based on the leaked Virgin Mobile RUU, and have been missing some unique Sprint elements. Not Booster Shot RC2.
Booster Shot touts that it's a port of the Boost Kingdom ROM using a leaked Sprint ICS base. I don't know how one tells if it's an official Sprint leak or not, or whether it matters in the end. The ROM functions as well as most of the Virgin Mobile leak-based ROMs do ten days after the leak: fairly solid and battery efficient.
Along with the base ROM, functionality has been added to incorporate Beats, Bravia, XLoud, TVOut, Panorama, HDR, and a host of other nifty features we've come to expect come standard with custom ROMs these days.
We're still in the early days of development on ICS leaked ROMs on the 3D, so you're probably going to run into something annoying along the way. If you're needing rock solid stability you might want to hold off till next month when an official Sprint release is expected to drop, although no guarantees that will be any more stable, and it will definitely be less full-featured than the custom ROM options out there.
If you're willing to take the ICS HTC EVO 3D plunge, make a nandroid backup, flash the ROM, and let us know what you think of it.