For Warforged:
"This feat strips away some of the more unnecessary armor plating on your body, leaving you slightly more vulnerable to enemy attacks but less resistant to positive energy. Your inherent fortification is reduced from 25% to 10%, but your base healing amplification is increased from 50% to 65% (note that the Healer's Friend enhancements now result in 80%, 85%, and 90% healing amplification)."
I'd certainly take it on my less feat starved Warforged. Some people might be saying "omg OP", but if you haven't noticed since u11 went live a lot of high level monsters have been using improved sunder, and having over-100% fortification values has become useful instead of redundant (imp sunder would put a WF with this feat at exactly 100%, and there are other fort reducers out there as well).