The goods and bads of both are about even, its all about opinion. If your a hard core off roader where you see pavement rarely. than SAS it, if you are running on the pavement or dirt roads a lot just beef it up. I only have one more thing to do to mine before its 100% bulletproof and that is the RCB axles. I will say though i have never broken an IFS component but i sure have snapped the ever living crap out of my axles on a dana 60.