The Silent Threat: Reborn project is one that improves on the original Silent Threat campaign by removing out-of-place missions, fixing buggy missions and fleshing out the campaign's story. We don't make things. We make them better.
Generally speaking, ST:R is a high-quality, traditionalist mod with some interesting plot twists. Some missions are too long, though, and typically, the longer the mission, the more likely it was designed to be won or lost in the last minute. That's ST:R's biggest defect in my view. Everything else is top-notch, including mission design and voice acting.
Recently I started to experience some problems with one of the missions, but since they weren't there when I first played ST:R, I don't count it as a flaw in the mod.